Chris Perry, Author

Tag: 16th century Japan

The Third Unifier – Tokugawa Ieyasu. Part Two.

The Battle of Okehazama in 1560 saw Tokugawa Ieyasu’s masters, the Imagawa, dealt a serious blow at the hands of Oda Nobunaga. In the aftermath, Ieyasu began asserting his independence, and in 1562, the so-called “Kiyosu Alliance” between Ieyasu and Nobunaga was formalised.

The mon of the Tokugawa.
_{^{百楽兎 – 投稿者自身による著作物, CC 表示-継承 3.0, https://commons.wikimedia.org/w/index.php?curid=1056853による}}

The Imagawa, however, were down, but not out, and Ieyasu’s position was far from secure, despite his new alliance. In 1563, the “Mikawa Ikko-Ikki” Rebellion broke out, and in early 1564, when the Imagawa announced their intention to crush Ieyasu, several of his vassals in Mikawa switched sides, joining the Ikko-Ikki or else rising against Ieyasu in anticipation of an Imagawa attack.

The name “Ikko-Ikki” suggests that the uprising was similar to other religiously motivated risings that occurred throughout Japan during this period. Indeed, the focal point seems to have been several temples in Mikawa; however, some scholars now suggest that the uprising was motivated more by economic reasons, and some even go so far as to say that Ieyasu may have provoked the rising, or at least took advantage of it to cement his control of Mikawa Province.

A later depiction of the Battle of Azukizaka. Ieyasu is the figure on the white horse on the right.

While it’s impossible to know for sure, Ieyasu did much to boost his own reputation in putting down the rebellion. At the Battle of Azukizaka (sometimes called the Battle of Batogahara) in January 1564, Ieyasu led his forces in crushing the rebels, despite ferocious fighting. The story goes that Ieyasu charged the enemy fearlessly, and came under heavy gunfire, with several rounds penetrating his armour, but leaving him uninjured, inspiring his men, and leading some rebels to switch sides.

In the aftermath, Ieyasu banned the Jodo Shinshu sect of Buddhism in Mikawa, only to lift the ban in 1567, just a few years later, lending credence to the argument that the fighting had never been about religious issues but about political control of the province.

The Honshuji Temple, one of the focal points of the rebellion, as it appears today.

Before 1566, Ieyasu’s family name was Matsudaira, but around this time, he petitioned the Emperor to change it to Tokugawa. The exact reasons for this are related to the complex (and often impenetrable) genealogies of the Minamoto and Fujiwara Clans, from whom Ieyasu claimed descent. You may remember that Minamoto and Fujiwara were the names of two of Japan’s most ancient and illustrious families, and it was a big deal to claim descent from them.

This would become much more important later, as only a member of the Minamoto could become Shogun (technically), but that was still decades in the future. At the time, the name change was probably more closely associated with prestige and a desire to assert independence from the Imagawa, with a new name symbolising a new era for the clan.

Takeda Shingen.

In 1567, Ieyasu further strengthened his alliance with Nobunaga by marrying his eldest son to Nobunaga’s daughter. However, they were both just nine years old at the time, so the marriage was a political rather than conjugal union. The next year, Ieyasu dispatched forces to support Nobunaga’s march on Kyoto, and in December, he made an alliance with Takeda Shingen and launched a joint invasion of Imagawa territory.

The attack was a success, but the relationship between Ieyasu and Shingen fell apart almost immediately. According to Tokugawa accounts, it had been agreed that Ieyasu would take Totomi Province, and Shingen would take Suruga. However, it wasn’t long before Takeda forces were also crossing into Totomi, in direct violation of the agreement (which may never have existed to begin with).

Suruga and Totomi Provinces.
_{^{By Ash_Crow – Own work, based on Image:Provinces of Japan.svg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1691864}}

Ieyasu then sought the support of the Hojo Clan, and their Lord, Ujiyasu, who had his own ambitions for the former Imagawa territory. Together, they successfully pushed the Takeda forces back, and in 1570, Ieyasu moved his base from Okazaki Castle in Mikawa Province to Hikuma, which he promptly renamed Hamamatsu, in Totomi. Later that year, he would further prove his value as an ally of Oda Nobunaga by supporting his campaign against the Azai-Asakura Alliance, fighting in the rearguard in the defeat at Kanegasaki, and then providing important reinforcements at the victorious Battle of Anegawa in July.

In 1571, the alliance would be sorely tested, as the last Ashikaga Shogun, Yoshiaki, sought to rally forces in opposition to Oda Nobunaga, with the ultimate goal of restoring his family’s position. The Anti-Nobunaga coalition (which was, importantly, not necessarily pro-Ashikaga) included the forces of the Azai-Asakura Alliance, the powerful temple of Ishiyama Honganji, and Takeda Shingen, among others.

Ashikaga Yoshiaki

In the aftermath of the defeat of the Imagawa, Hojo Ujiyasu, who had favoured an alliance with Ieyasu against the Takeda, died and was replaced by his son, Ujimasa, who reversed his clan’s diplomatic position and reestablished the alliance with Shingen. At this point, Yoshikai, seeking to take advantage of the pressure he was now under, sought to gain Ieyasu’s support, offering him the position of Kanrei or deputy Shogun in exchange.

Ieyasu refused this offer and chose to retain his alliance with Nobunaga; in response, Takeda Shingen launched an invasion of the Mikawa and Totomi Provinces in September 1572. Leading 20,000 troops, Shingen crossed the Aokuzure Pass, and with the help of several defections amongst Ieyasu’s retainers, swiftly gained control of northern Totomi.

A later depiction of the Takeda Army advancing into Totomi Province.

Meanwhile, a separate force invaded Nobunaga’s territory in Mino, meaning that when Ieyasu called for aid, none was readily available. Ieyasu was forced into an impossible situation; his forces were heavily outnumbered by the advancing Takeda, and a pitched battle would almost certainly end in defeat. On the other hand, if he retreated or even stayed on the defensive, he faced the prospect of losing support from his retainers, some of whom had already proved they were willing to switch sides.

The Takeda headed towards the strategically important Futamata Castle, and Ieyasu had no choice but to try to head them off. The advance guards of both armies clashed at the Battle of Hitokotozaka, and the Tokugawa were soundly beaten, causing them to retreat to the relative safety of Hamamatsu, and giving the Takeda a clear path to lay siege to Futamata, which fell shortly afterwards.

The remains of Futamata Castle.
_{^{CC 表示-継承 3.0, https://commons.wikimedia.org/w/index.php?curid=427661}}

In the aftermath of this disaster, still more Tokugawa retainers switched sides and joined the Takeda, and it was assumed that Shingen, whose army, strengthened by defections and reinforcements, now stood at around 30,000 men, would march on Hamamatsu. Instead, the Takeda forces bypassed it entirely. It has been suggested that this was a ploy to lure Ieyasu out of the powerful fortress, giving Shingen the opportunity to destroy him in the open.

If that was the plan, it worked, and despite urging from his retainers to remain in Hamamatsu, Ieyasu was emboldened by some long-awaited reinforcements from Nobunaga and decided to march out and intercept the Takeda. The result was the disastrous Battle of Mikatagahara, in which the Tokugawa were decisively defeated, with Ieyasu himself only being saved by the bravery of his retainers, who fought a rearguard action so ferocious that Ieyasu was allowed to escape, and the Takeda were convinced to call off the pursuit.

A later depiction of the Battle of Mikatagahara

The winter of 1572 saw the Takeda forces camping deep inside Tokugawa territory, whilst Ieyasu himself was holed up in Hamamatsu, his army scattered, and his prospects looking very bleak.

A painting of Ieyasu supposedly made after the defeat at Mikatagahara. Traditional history suggests that Ieyasu commissioned the painting as a reminder of the defeat and a warning against future arrogance; however, this account doesn’t appear in any sources before the 20th century and is now generally believed to be apocryphal.

Sources
https://ja.wikipedia.org/wiki/%E5%BE%B3%E5%B7%9D%E5%AE%B6%E5%BA%B7
https://ja.wikipedia.org/wiki/%E4%B8%89%E6%96%B9%E3%83%B6%E5%8E%9F%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E4%BA%8C%E4%BF%A3%E5%9F%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E4%B8%80%E8%A8%80%E5%9D%82%E3%81%AE%E6%88%A6%E3%81%84
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https://ja.wikipedia.org/wiki/%E5%A7%89%E5%B7%9D%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E6%8E%9B%E5%B7%9D%E5%9F%8E
https://ja.wikipedia.org/wiki/%E6%B5%9C%E6%9D%BE%E5%9F%8E
https://news.yahoo.co.jp/expert/articles/c8236e8b4e534230da1d01117685da63b98d761a
https://ja.wikipedia.org/wiki/%E5%B0%8F%E8%B1%86%E5%9D%82%E3%81%AE%E6%88%A6%E3%81%84_(1564%E5%B9%B4)
https://ja.wikipedia.org/wiki/%E4%B8%89%E6%B2%B3%E4%B8%80%E5%90%91%E4%B8%80%E6%8F%86
https://ja.wikipedia.org/wiki/%E5%B2%A1%E5%B4%8E%E5%9F%8E
https://ja.wikipedia.org/wiki/%E6%9C%AC%E5%AE%97%E5%AF%BA

April 10, 2026
The Second Unifier – Toyotomi Hideyoshi. The Final Chapter.

In 1591, with dominance of Japan secured, Hideyoshi announced his intention to invade Ming China, via Korea, launching the first of two campaigns to subjugate the small kingdom. We’ll take a look at these invasions in more detail later, but in summary, the Japanese landed with a force of some 160,000 veteran warriors and achieved a series of quick successes against the Koreans.

A contemporary Korean image of the Japanese attack on Busan.

However, Chinese intervention turned back the invasion, and ultimately led to a stalemate that ended in a negotiated peace in 1593, that saw Japanese warriors remain in the fortresses they have built in the south of the peninsular, from which they would launch a second attempt in 1597, which would end when political changes at home saw the Japanese leave, with both sides declaring ‘victory’.

Meanwhile, Hideyoshi, who had ordered the invasion but did not travel to Korea himself, was facing problems closer to home. In 1591, his brother, Hidenaga, who had been an important military and political supporter, died. This was followed in short order by Tsurumatsu, Hideyoshi’s two-year-old son and heir, throwing the succession into doubt.

A stylised image of Tsurumatsu, who was only two when he died.

In response, Hideyoshi adopted his nephew, Hidetsugu, as heir to the Toyotomi family, and (presumably) eventually to supreme power. This arrangement endured until 1593, when one of Hideyoshi’s concubines, Lady Yodo, gave birth to a second son, Hideyori, whose arrival was apparently widely celebrated.

That is, widely celebrated by everyone but Hidetsugu, whose position was now under threat. In 1595, rumours began to spread that Hidetsugu was plotting rebellion, and a delegation, led by Ishida Mitsunari, was sent to his residence to investigate. He wrote a five-page letter declaring himself innocent of the accusations, which was promptly delivered to Hideyoshi.

Toyotomi Hidetsugu

Hideyoshi then summoned his nephew for an audience, but when Hidetsugu arrived at Fushimi Castle, as ordered, he was denied entry and instead told to shave his head and become a monk. Hidetsugu apparently complied, retiring to Mount Koya. However, even this was not enough, and on August 20th, 1595, an order arrived demanding Hidetsugu commit seppuku.

Hidetsugu swiftly complied, but even this did not satisfy Hideyoshi, who went further and ordered the deaths of Hidetsugu’s entire family. In the end, 39 people, including children, wives, and concubines, were beheaded at Sanjo Kawara, in Kyoto, and dumped in a mass grave. Some sources say that the commoners who came to watch were so disgusted with the manner of the executions that they began hurling insults at the magistrates responsible, and in the aftermath, a memorial stone dedicated to “Hideyoshi’s Evil” was erected.

A 19th-century depiction of Hidetsugu committing seppuku. Even his death did not spare his family from Hideyoshi’s wrath.

Theories around why Hideyoshi ordered his nephew’s death, and why it was carried out with such thorough brutality, have swirled since the moment Hidetsugu’s head was struck off. A common view is that Hidetsugu really was planning to rebel, or at least Hideyoshi believed he was, and the purge that followed was simply ensuring no one survived to take revenge.

Another theory is that Hidetsugu himself had earned a reputation as a violent lunatic, routinely hacking people down in the street, and even being known to take potshots at commoners with a musket, earning him the nickname the “Killing Regent”. Modern scholars are generally sceptical of this reputation, however, citing a lack of contemporary sources referring to what should have been a fairly well-known situation.

A much later depiction of Hidetsugu (top left) taking potshots at passersby. Images like this served to discredit Hidetsugu’s memory, but sources from his lifetime make no mention of such behaviour, except in reporting rumours.

An addition to this theory is that Ishida Mitsunari, and his associates, deliberate sought to slander Hidetsugu in the eyes of Hideyoshi, though again this is now widely seen as a latter invention, written by authors in the Edo Period, decades after the events, and writing at a time when there was active interest in painting both Hideyoshi, and Mitsunari in a bad light.

All of this paints Hideyoshi in an increasingly tyrannical light, and subsequent events in his reign would not help matters. In 1596, the Keicho-Fushimi Earthquake struck the area around modern Osaka, leading to widespread damage and the deaths of more than a thousand people. Earthquakes are nothing out of the ordinary in Japan, but damage to several temples around Kyoto prompted an inspection by Hideyoshi himself.

A 19th-century depiction of Hideyoshi during the Keicho-Fushimi Earthquake.

At the Hokoji Temple, Hideyoshi had ordered the construction of a “Great Buddha”, which was said to be over 19m tall, making it one of the largest in history. However, in order to speed up construction, Hideyoshi is said to have ordered the construction changed from the traditional bronze to wood. When the earthquake struck, the Buddha was badly damaged as a result of its lighter construction.

It is said that Hideyoshi, enraged at the damage caused to so expensive a monument, took a bow and shot an arrow into the Buddha’s forehead. Such an act of sacrilege was widely condemned, but scholars disagree over whether it actually happened, as the only sources (again) come from much later. The contemporary sources only say that Hideyoshi, upon inspecting the damage, ordered the Buddha and the hall containing it to be dismantled.

A sketch by Dutch merchant Engelbert Kaempfer, showing the great Buddha as it appeared in 1691.

On a side note, both structures would be reconstructed by Hideyoshi’s successor, Hideyori, and the re-consecration of the site would indirectly lead to the downfall and destruction of the Toyotomi Clan in 1615, but that’s a story for another time.

As we’ve discussed previously, Hideyoshi had issued an order expelling Christian missionaries from Japan back in 1587, but it had generally gone unenforced. That changed in 1596, when the Spanish Galleon, San Felipe, wrecked off the coast of Shikoku. In the immediate aftermath, the local lord (who happened to be a Chosokabe) confiscated the ship’s cargo, and the Spanish complained to Hideyoshi.

A European Ship in Japanese waters around the late 16th Century.

It seems that Hideyoshi himself didn’t much care about the confiscated Spanish treasure; however, one of the crew aboard the San Felipe, a man known as de Hollandia, proved to be a bit of a blowhard. He boasted to the local Japanese authorities that the Spanish Empire was vast, and he produced a map of the world to prove his point.

The Japanese were shocked that the Spanish holdings were so extensive, and when they asked how Spain had come to acquire such territory, de Hollandia made the fateful mistake of claiming that missionaries had gone in first to convert the population, who then served as a vanguard for the Conquistadors who followed.

The classic image of a Conquistador, this one in Seville, Spain. Though the Conquistadors were very successful in the Americas and the Philippines, they never set foot in Japan, though Hideyoshi had reason to fear they might.
_{By CarlosVdeHabsburgo – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=24964604}

Hideyoshi may not have cared about treasure, but he was definitely paying attention now. He took the silver for himself and then ordered all Spanish Friars in Osaka arrested, along with several Japanese converts. In the end, 26 were taken to Nagasaki and publicly executed

1596 also saw the restart of conflict in Korea, when negotiations with the Chinese broke down, and Hideyoshi ordered a second invasion, dispatching 140,000 men to reinforce the garrisons already in place. This time, instead of attempting to take the whole of Korea, Hideyoshi planned a more limited campaign, advancing into Gyeongsang Province and securing defensible positions there to serve as staging grounds for another round of conquest later.

An image depicting the fighting around Ulsan, site of some of the fiercest battles of the second invasion.

By late 1597, however, Hideyoshi knew he was nearly done. His son and heir, Hideyori, was just a child, and he knew that his succession was far from guaranteed. In order to guarantee a peaceful transfer of power, he summoned five powerful Daimyo to Fushimi, making them swear to rule the realm as a Council of Regents (or Elders) until Hideyori came of age.

The five regents were Ukita Hideie, Maeda Toshiie, Uesugi Kagekatsu, Mori Terumoto, and Tokugawa Ieyasu. Of the five, Ieyasu was far and away the most powerful, though he was not strong enough to oppose the other four directly, especially the venerable Maeda Toshiie and Mori Terumoto. This was presumably the point, however, as Hideyoshi wanted to create a council that was made up of men strong enough to rule, but not strong enough to rule alone.

The Council of Five Elders, from left to right: Tokugawa Ieyasu, Ukita Hideie, Maeda Toshiie, Uesugi Kagekatsu, and Mori Terumoto. Of the five, Ieyasu was the most powerful, and it became the task of the other four to rein him in.

Hideyoshi passed away in August 1598, and the order he had done so much to create would not long outlive him. The council he had created fell apart within a year, following the death of Maeda Toshiie in 1599 and the political manoeuvring of Tokugawa Ieyasu, who won the decisive Battle of Sekigahara in 1600 and was declared Shogun in 1603.

Though Hideyori would never rule in his own right, he would continue on as a living example of Hideyoshi’s legacy, but he would eventually fall foul of the rising power of the Tokugawa, and Hideyoshi’s line would come to an end in 1615, though, once again, we are getting ahead of ourselves.

Sources
https://ja.wikipedia.org/wiki/%E8%B1%8A%E8%87%A3%E7%A7%80%E5%90%89
https://ja.wikipedia.org/wiki/%E3%82%B5%E3%83%B3%EF%BC%9D%E3%83%95%E3%82%A7%E3%83%AA%E3%83%9A%E5%8F%B7%E4%BA%8B%E4%BB%B6
https://ja.wikipedia.org/wiki/%E6%85%B6%E9%95%B7%E4%BC%8F%E8%A6%8B%E5%9C%B0%E9%9C%87
https://ja.wikipedia.org/wiki/%E6%96%B9%E5%BA%83%E5%AF%BA%E9%90%98%E9%8A%98%E4%BA%8B%E4%BB%B6
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https://ja.wikipedia.org/wiki/%E8%B1%8A%E8%87%A3%E7%A7%80%E6%AC%A1
https://ja.wikipedia.org/wiki/%E6%96%87%E7%A6%84%E3%83%BB%E6%85%B6%E9%95%B7%E3%81%AE%E5%BD%B9

March 27, 2026
The Second Unifier – Toyotomi Hideyoshi. Part Six.

The mon of the Toyotomi Clan.

By the late 1580s, Hideyoshi was at the very pinnacle of political and military power in Japan. Jesuit records from the time name him “tyrant” and suggest that he has achieved more power over the realm than any warlord before him.

After the successful conclusion of the Kyushu Campaign, Hideyoshi ordered a new palace built in Kyoto. Called Jurakudai (or Jurakutei in some sources), Toyotomi moved his political base there from Osaka Castle in early 1588, inviting the Emperor Go-Yozei for a feast in April 1588 and obliging powerful Daimyo (such as Tokugawa Ieyasu) to travel there and pay homage to him.

An image of the Emperor visiting Jurakudai.

Having secured personal political power, Hideyoshi then turned his attention to pacifying the realm at large. Through his military campaigns, he had subdued most of the powerful Daimyo in the realm, but there remained the issue of establishing peace at the local level as well.

The Sengoku Jidai exists in the popular imagination as more than a century of conflict, featuring epic clashes between armies of Samurai loyal unto death, and iconic lords like Takeda Shingen, Oda Nobunaga, and Uesugi Kenshin, who were locked in a titanic struggle for ultimate control of the realm.

Uesugi Kenshin and Takeda Shingen engaged in a duel that probably never happened but remains an enduring, if inaccurate, image of the Sengoku-era battlefield.

Whilst there is certainly truth to this image, much like any period of civil war, Japanese society at large had become incredibly violent during the 16th century. At the local level, the decentralised nature of Daimyo rule led to the emergence of Jizamurai, literally “Local Samurai”. These men often started out as armed peasants, usually levied into the armies of some local lord, and sent home again when the campaign ended.

Throughout the 16th century, these Jizamurai gradually achieved military and political influence over their local communities, often being allowed to collect tax revenue on behalf of their lord in exchange for military service, similar to a Knightly Manor in medieval Europe.

This situation worked fine whilst the realm was fractured into dozens of minor domains, but as consolidation followed conquest in the latter half of the 16th century, tensions between “Samurai” and “Jizamurai” became more of an issue. When a lord was defeated, he was usually killed or deprived of his land, meaning that the Jizamurai would often find themselves serving a new lord to whom they had no personal loyalty, leading to frequent conflicts.

Ashigaru on campaign. By the late 16th century, the distinction between Warrior and Peasant was often unclear to the point of being non-existent.

On a societal level, the distinction between Jizamurai and peasants was often academic. Though technically of a higher social status, a Jizamurai usually lived in the village, amongst the peasantry, who would themselves often have access to weaponry and a far greater loyalty to their local Jizamurai than to some powerful Daimyo whom they never saw.

This led to frequent Peasant Uprisings throughout the Sengoku Period, most famously the Ikko-Ikki, who were motivated by religious fervour but were largely made up of peasants and Jizamurai. It wasn’t just political violence; feuds between villages were common and often escalated into violence, as rival communities would quickly resort to the sword to settle disputes over territory, waterways, and other local matters.

In 1587, Hideyoshi passed a law forbidding the use of force to resolve such disputes. Though the exact wording of the law has been lost, by looking at the wording of laws from the later Edo Period, which often referred to ‘precedents’ (i.e., earlier laws), we can infer what Hideyoshi’s decrees may have looked like.

If any villagers or other people in a village engage in a dispute over mountains or waters, using bows, spears, or guns to fight amongst themselves, that entire village shall be punished. – From a decree by Shogun Tokugawa Hidetada -1610

Scholars debate exactly what Hideyoshi intended with this law, with some suggesting that he meant to disarm and pacify the peasants, whilst others say it was more to do with establishing who had weapons, and who had the right to weapons, part of an ongoing centralisation campaign in which a clearer line was to be drawn between Warrior and Peasant.

In 1589, Hideyoshi celebrated the birth of a son, Tsurumatsu, whom he swiftly named as his heir, securing his dynasty for the foreseeable future. The following year, after a series of political slights, he launched a decisive campaign against the Hojo, lords of the Kanto, crushing them in the Odawara Campaign.

A later, heavily stylised depiction of Hideyoshi’s son, Tsurumatsu.

Also in 1590, he crushed the defiant clans of Northern Japan in a swift campaign, and it is at this point that the “Sengoku Jidai” is said to have come to an end. For the first time in more than a century, the country was under the control of one man, and the realm would never again fracture as it once had. Despite this, one decision made by Hideyoshi in the aftermath of the Odawara Campaign had already sown the seeds of his clan’s ultimate downfall.

With the destruction of the Hojo, Hideyoshi offered the five provinces of the Kanto to Tokugawa Ieyasu, in exchange for the three he had originally ruled. At the time, this move was seen as political savvy. It positioned the potentially rebellious Ieyasu farther from Kyoto, and though the five Kanto provinces were nominally richer than the three Ieyasu had given up, they had recently been conquered and were potentially volatile, meaning the move weakened Ieyasu in the short term.

Tokugawa Ieyasu.

Hideyoshi, however, had not considered Ieyasu’s political and economic acumen. His base in the Kanto would eventually serve as a springboard for his own rise to power, demonstrated perhaps most clearly by the fact that Japan’s modern capital, Tokyo, is on the same site as Ieyasu’s was, more than 430 years after he moved there, but we’re getting ahead of ourselves.

The threat from Ieyasu was not Hideyoshi’s only concern, however. In 1591, his brother, Hidenaga, who had proven to be an extremely competent commander and political ally, died in February, followed by his son and heir, the two-year-old Tsurumatsu, in September of the same year.

Toyotomi Hidenaga

Following these deep personal and political blows, Hideyoshi adopted his nephew, Hidetsugu, and then retired, handing control of the clan over to him. As was common at the time, Hideyoshi retained true political power; however, becoming known as the Taiko, a title of respect for former regents.

Also in 1591, with Japan secured, Hideyoshi announced his intention to invade China, launching a brutal invasion of Korea to use it as a base for his main objective. We’ll give the Korean Wars their own post, but for now, we can say that the invasions both highlighted Hideyoshi’s power and brought about political divisions that would ultimately destroy his legacy.

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March 20, 2026
The Second Unifier – Toyotomi Hideyoshi. Part Four.

Despite an ultimately unsuccessful campaign against Tokugawa Ieyasu, by late 1584, Hideyoshi was the most powerful man in the realm. Having secured his position as Oda Nobunaga’s successor, he dominated central Japan and could call on economic and martial resources that dwarfed those of his rivals.

The strategic situation in late 1584, Hideyoshi controlled the territory in red.
_{^{By Alvin Lee – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=39198357}}

Despite this, he was not yet unchallenged. To the west, the Mori remained undefeated, to the east, was Tokugawa Ieyasu, and further away, the Hojo, who had remained untouched by Nobunaga’s conquests, and to the south, in Kii Province, the locals coalesced around fiercely independent religious and social movements that resisted any attempts to impose central rule.

Meanwhile, Hideyoshi solidified his political power, being elevated to the Third Rank of the nobility in November 1584 and to the Second Rank in March 1585. Around this time, some sources suggest that the Imperial Court even went so far as to offer him the title of Shogun, only for Hideyoshi to refuse, though the exact nature of the offer, if it existed at all, is unclear.

Kii Province.
_{^{By Ash_Crow – Own work, based on Image:Provinces of Japan.svg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1683109}}

With his position secured, Hideyoshi turned his attention to Kii Province. We’ve spoken about the power of certain religious institutions before, and nowhere was this more apparent than in Kii (sometimes called Kishu). Luis Frois, a well-known Portuguese writer at the time, referred to the area as under the control of five “Great Republics”, which weren’t democracies in the way we’d recognise today, but were strongly independent polities with extensive territories, economic might, and military strength.

In 1570, Nobunaga began what would prove to be a long campaign against the power of the Ikko-Ikki, based at Honganji Temple. The warrior monks of Kii Province were a key ally of the Ikko-Ikki, and in 1576, Nobunaga dispatched an army against them, aiming to reduce their ability to support his enemies elsewhere.

A semi-contemporary depiction of Nobunaga’s attempts to subdue Kii Province.

Despite being defeated on the battlefield, the warriors of Kii engaged in guerrilla warfare, led most famously by the Saika-shu, an organisation made up of local samurai and mercenaries, which was well known for its heavy (and skilful) use of firearms. Nobunaga eventually signed a peace treaty and withdrew, allowing his enemies to claim that they had actually defeated him.

Nobunaga’s death in 1582 put an end to any further campaigning, and for a time, at least, Kii Province was left alone, though no one believed the peace would last. In early spring 1586, Hideyoshi, at the head of an army of some 100,000 men, invaded with the intention of crushing the independent ‘Republics’ for good.

A depiction of Hideyoshi’s attack on Kii Province.

The campaign was a true demonstration of Hideyoshi’s new power. Though the Saika-shu and others fought bravely, they were swiftly overwhelmed. Some scholars speculate that the Saika and their allies underestimated Hideyoshi. In the earlier Sengoku Period, it had often been enough to inflict heavy casualties in an initial battle, which would force the attackers to either negotiate or back off.

These tactics had worked against Nobunaga, who had ultimately been unable to secure decisive control over Kii, for fear of tying down too many men. Hideyoshi had no such hesitation, and even though his losses were heavy, he kept pushing on, and the Saika, who were often hugely outnumbered, were swept aside.

Firearms of the type used effectively, but ultimately unsuccessfully by the Saika-shu.

Hideyoshi was able to secure control of Kii in the short term, but his hold over it was always fragile, and there would be several more outbreaks of rebellion in the coming years. In fact, it wouldn’t be until 1614, long after Hideyoshi had passed away, that Kii could be truly said to have been pacified.

After this, Hideyoshi turned his attention to Shikoku and the powerful Chosokabe Clan. Once allies of Nobunaga, the Chosokabe had fallen foul of his ambitions and had been under threat of invasion at the time of his death at Honnoji.

Shikoku.
_{^{By TUBS – This vector image includes elements that have been taken or adapted from this file:, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=16385942}}

An army under Nobunaga’s third son, Nobutaka, had been gathered at Sumiyoshi (in modern Osaka) with the purpose of attacking Shikoku; in fact, they had been meant to set out on the same day that Nobunaga was killed, and news of his death demoralised the army, some of which simply went home.

In the aftermath of Nobunaga’s death, the Chosokabe had consolidated control of all of Shikoku and lent support to opponents of Hideyoshi, notably Shibata Katsuie, Tokugawa Ieyasu, and the Saika-shu of Kii Province. None of these enemies had been able to overcome Hideyoshi, however, and it was probably no surprise when he turned his vengeful eye on the Chosokabe themselves.

Chosokabe Motochika, Lord of the Chosokabe at the time of Hideyoshi’s invasion.

There were some attempts at negotiation, but Hideyoshi’s demands that the Chosokabe give up three of the four provinces of Shikoku were unacceptable. The strategic situation for the Chosokabe was made worse when the Mori, one-time antagonists of Hideyoshi, instead made a permanent peace with him. Some sources suggest that it was at this point that the Mori submitted to Hideyoshi outright.

With the support of the Mori and their powerful navy, Hideyoshi launched a three-pronged attack on Shikoku, which the Chosokabe were hard-pressed to oppose. Outnumbered some 3 to 1, the Chosokabe fought bravely, but the campaign was over quickly. From June to August 1585, there was a series of battles and sieges that invariably resulted in Chosokabe defeat.

A 19th-century depiction of the Invasion of Shikoku.

Eventually, despite claiming he would rather fight to the end, Chosokabe Motochika surrendered at the urging of his senior vassals. As punishment for his defiance (or reward for his surrender), Hideyoshi confiscated three of the four Shikoku Provinces, leaving the Chosokabe with their home province of Tosa and an obligation to provide Hideyoshi with up to 3,000 troops for any future campaign and hostages to ensure the peace.

During the Shikoku Campaign, which was led by his brother, Hideyoshi was appointed Kampaku by the Imperial Court. This was a result of a political crisis that had been ongoing since before Nobunaga’s death in 1582. At the time, the Imperial Court had (allegedly) invited Nobunaga to become Shogun, or Kampaku (Regent). Both contemporary and modern scholars disagree on Nobunaga’s response to this offer, but his death in June of that year ultimately rendered it moot.

Emperor Go-Yozei, who was the sovereign during this time.

What followed was a drawn-out political squabble between rival factions at court over who would ultimately take the position of Regent. We’ve spent a lot of time looking at how the Imperial Court was a decorative but ultimately impotent organisation by this point, and any title the Emperor might bestow would be largely symbolic without any external political power to back it up.

Into this silk-clad quagmire stepped Hideyoshi. Traditionally, the position of Regent had rotated amongst five prestigious warrior families, of which Hideyoshi was not a member. To overcome this issue (which was one of tradition, rather than law), he was formally adopted as the son of Konoe Sakahisa (who was less than a year older than him) in July 1585, being named Kampaku shortly afterwards.

Konoe Sakahisa, who formally adopted Hideyoshi.
_{^{Leehiroki258 – 投稿者自身による著作物, CC 表示-継承 4.0, https://commons.wikimedia.org/w/index.php?curid=162775880による}}

There was supposedly an agreement in which the childless Hideyoshi would take the position as a temporary solution to the crisis, before handing it over to the Konoe family’s chosen heir at a later date. Hideyoshi had other ideas, however. In 1586, he petitioned the Emperor for a new family name, which the Emperor duly bestowed. From then on, Hideyoshi would be known as Toyotomi Hideyoshi, the name by which he is best remembered in English sources.

Hideyoshi would then adopt the Emperor’s younger brother, Prince Hachijo, as his son and eventual successor. This was a clear breach of the agreement with the Konoe, but since Hideyoshi was the most powerful man in the realm, and the proposed heir was a member of the Imperial Family, there was nothing anyone could do about it.

Prince Hachijo

Hideyoshi went further, seeking to replace the powerless Imperial aristocracy with a new “Samurai Nobility”. For centuries, the ‘Nobles’ had held all the prestige, but practically none of the actual power, which was in the hands of the Samurai after long years of civil war.

Hideyoshi sought to address this by bestowing titles on some of the other powerful Daimyo, including Tokugawa Ieyasu and Ishida Mitsunari, appointments that would have long-term political repercussions.

Ishida Mitsunari, we haven’t talked about him much, but he’s going to become very important later.

Another attempt was made to force obedience from Ieyasu when Hideyoshi demanded that he hand over hostages to ensure ongoing peace. Ieyasu refused, and Hideyoshi began planning a large-scale military campaign to finally bring Ieyasu to heel. The massive Tensho Earthquake in January 1586 caused severe damage to Hideyoshi’s capital at Osaka and several other castles and staging areas, bringing an end to the plans, and causing Hideyoshi to adopt a more conciliatory policy towards Ieyasu.

A monument at the site of Kaerikumo Castle, which was destroyed in a landslide during the 1586 earthquake. The evidence of the landslide can be seen on the hill in the background.

Later that year, Ieyasu would marry Hideyoshi’s younger sister, Princess Asahi, and he would later travel to Kyoto and swear allegiance to Hideyoshi as Regent. Despite this nominal submission, Hideyoshi had failed to subdue Ieyasu, whose military power remained intact.

Sources
https://ja.wikipedia.org/wiki/%E8%B1%8A%E8%87%A3%E7%A7%80%E5%90%89
https://ja.wikipedia.org/wiki/%E6%9C%9D%E6%97%A5%E5%A7%AB
https://ja.wikipedia.org/wiki/%E9%96%A2%E7%99%BD%E7%9B%B8%E8%AB%96
https://ja.wikipedia.org/wiki/%E5%85%AB%E6%9D%A1%E5%AE%AE%E6%99%BA%E4%BB%81%E8%A6%AA%E7%8E%8B
https://ja.wikipedia.org/wiki/%E8%BF%91%E8%A1%9B%E5%89%8D%E4%B9%85
https://ja.wikipedia.org/wiki/%E5%9B%9B%E5%9B%BD%E6%94%BB%E3%82%81
https://ja.wikipedia.org/wiki/%E4%B8%B8%E5%B1%B1%E5%9F%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E5%9B%9B%E5%9B%BD%E5%9B%BD%E5%88%86
https://ja.wikipedia.org/wiki/%E5%9B%9B%E5%9B%BD%E5%B9%B3%E5%AE%9A
https://ja.wikipedia.org/wiki/%E7%B4%80%E5%B7%9E%E5%BE%81%E4%BC%90
https://ja.wikipedia.org/wiki/%E9%9B%91%E8%B3%80%E8%A1%86
https://ja.wikipedia.org/wiki/%E6%A0%B9%E6%9D%A5%E8%A1%86
https://en.wikipedia.org/wiki/Kii_Province
https://en.wikipedia.org/wiki/1586_Tensh%C5%8D_earthquake
https://en.wikipedia.org/wiki/Kaerikumo_Castle

March 6, 2026
The Second Unifier – Toyotomi Hideyoshi. Part Two.

In 1577, a dispute between Toyotomi Hideyoshi and Shibata Katsuie led to Hideyoshi taking his army home, and leaving Katsuie to battle the mighty Uesugi Kenshin alone, a battle he lost. In the aftermath, Hideyoshi had every reason to fear the wrath of his master, Oda Nobunaga, and he was arguably lucky to keep his head, let alone his position.

A 19th-century depiction of Hideyoshi in Nobunaga’s service.

Nobunaga was well known for his ferocity, but he recognised capable subordinates. Hideyoshi had been reckless, but he had also earned a reputation as a good administrator and leader of men, and it wasn’t long before he was back in the Great Lord’s good books. In late 1577, he was dispatched west to contend with the powerful Mori Clan and by the end of the year, he was in control of Harima Province and advancing into neighbouring Tajima.

During this period, Hideyoshi made the famous Himeji Castle his base and used it as a springboard for a series of successful campaigns against the Mori over the next few years. By late 1578, he had subjugated (either through conquest or submission) Bizen and Mimasaka Provinces, in addition to his earlier conquests, and he was poised to advance further when the Araki Clan, based at Arioka Castle, rebelled, obliging him to redeploy his forces to put them down.

Himeji Castle as it appears today (after renovations in 2015)
_{^{Niko Kitsakis – 投稿者自身による著作物, CC 表示-継承 4.0, https://commons.wikimedia.org/w/index.php?curid=40135622による}}

Able to resume his advance in 1580, Hideyoshi secured Tajima Province, bringing the once-mighty Yamana Clan under his control and incorporating many of their former vassals and members of the clan itself into the new administration, a policy widely praised as the reason that Tajima was swiftly pacified.

By 1581, he had advanced into Bitchu Province and secured Awaji Island for his master, utilising slow but effective siege tactics, starving his enemies into submission, a time-consuming but strength-preserving strategy. One disadvantage, though, was that it meant you were easy to find should your enemy have sufficient strength elsewhere.

The area that Hideyoshi either conquered or was fighting in during this period.

In Spring 1582, Hideyoshi led an army of some 30,000 to besiege the mighty fortress at Takamatsu. Strategically vital for control of Bitchu Province, the castle was defended by 3,000 Mori warriors, who quickly called for aid. Mori Terumoto responded and began mustering an army that would eventually number over 50,000. Hideyoshi now faced a problem: already outnumbered, if he tried to take the formidable fortress by storm, he’d deplete his forces further. On the other hand, trying to starve the garrison, who knew help was on the way, would take too long and risk trapping his army between the walls of the fortress and the vengeful spears of the Mori.

Hideyoshi responded in a typically inventive fashion. Unable to take the castle by storm, he ordered a levee built and the nearby river dammed, diverting water into Takamatsu itself, flooding the castle to such an extent that the garrison’s food supplies were almost completely ruined and they were reduced to communicating by boat.

A later depiction of the Siege of Takamatsu Castle. The tower to the left is Hideyoshi’s observation post, and you can see the castle itself flooded in the background.

Despite this, the castle still held out, and when news arrived that Terumoto was on the march, Hideyoshi sent a message to Azuchi, requesting immediate reinforcement from Nobunaga. Sensing an opportunity to catch the powerful Mori clan in open battle, where they could be destroyed, Nobunaga quickly dispatched Akechi Mitsuhide to reinforce Hideyoshi, while he went to Kyoto to make arrangements for a larger force that would be sent to finish the job.

As we already know, Mitsuhide never arrived; instead, he turned his forces around and attacked Nobunaga at his base at Honnoji, killing him and his heir. Hideyoshi was well placed to respond to this betrayal, and he swiftly concluded a peace treaty with the Mori (who were apparently initially unaware of Nobunaga’s death). Some have speculated that his rapid reaction is evidence of his involvement, or at least foreknowledge of the plot, though there’s nothing concrete to suggest that he was anything other than in the right place at the right time.

Funasaka Pass as it appears today. This was one of the narrow routes that Hideyoshi’s army had to contend with during their remarkable march back towards Kyoto.
^{_{Bakkai – 投稿者自身による著作物, CC 表示 3.0, https://commons.wikimedia.org/w/index.php?curid=92337495による}}

More to the point, Hideyoshi was far from the only player on the board. Hideyoshi’s former rival, Shibata Katsuie, was to the north, with an army facing the Uesugi, while in the Kanto, Takigawa Kazumasu (sometimes called Sakon) had a large army intended to monitor the Hojo. Nobunaga’s son and heir had been killed during the Honno-ji Incident, but his third son, Nobukatsu, had gathered a force at Sakai (modern Osaka) to conquer Shikoku.

Any one of these forces could have been the one to avenge Nobunaga’s death and put an abrupt end to Akechi Mitsuhide’s ambitions. Even Tokugawa Ieyasu was a potential avenger, making his famed escape from mortal danger with the (supposed) help of the famous Ninja of Iga. Ieyasu would return to his home in Mikawa and gather his forces, but events would move quickly, and though all parties moved against Mitsuhide, it was Hideyoshi who struck first.

Tokugawa Ieyasu as he appeared in later life. He was close to Kyoto during the Honnoji Incident and was forced to make a dramatic escape back to Mikawa. Hideyoshi would prove to be faster, but Ieyasu’s time would come.

In the days following the Honnoji Incident, Mitsuhide moved to consolidate his position. Unfortunately for him, he faced harsh military and political opposition. On the one hand, Nobunaga’s body had not been recovered from the flames, and rumours abounded that he was still alive. Even among those who may have believed Nobunaga was dead, Mitsuhide commanded little respect. He was a traitor, after all, and surrounded by enemies who wished to avenge Nobunaga and take power for themselves.

Militarily, Mitsuhide was too weak to assert effective control over much territory. He had between 13,000 and 15,000 men, but was obliged to capture and garrison several important castles, whittling his already limited forces down still further. Then there was the speed at which Hideyoshi moved. Mitushide arguably did what he could, and with the limited communications and transportation available at the time, it’s hard to see how he could have moved faster, but Hideyoshi was faster still, and on July 2nd, 1582, just 12 days after Honnoji, the two sides clashed at the Battle of Yamazaki, to the south-east of Kyoto.

Akechi Mitsuhide. Historians debate why he decided to betray Nobunaga, but within two weeks of the incident, he’d be dead.

The numbers vary by source, but Hideyoshi is said to have had between 20 and 40,000 men, while Mitsuihides had 10 to 16,000. Despite the long odds, Mitsuhide’s army was well-positioned, and the ground around Yamazaki was boggy, limiting movement and reducing Hideyoshi’s advantage in numbers.

Mitsuhide probably understood that a defensive victory against difficult odds would have greatly enhanced his prestige, and for most of the day, Hideyoshi’s army took heavy losses in vicious frontal assaults. Around 4pm, however, reinforcements arrived for Hideyoshi, outflanking Mitsuhide’s position, and causing his army to fall back. As the battle moved to higher and drier ground, Mitsuhide’s force was gradually surrounded and forced back.

The battlefield of Yamazaki as it appears today. Historians believe the heaviest fighting took place around the bypass that can be seen in the centre.

Later sources suggest that the casualties were about the same (around 3,000 each), but under attack from three sides, the morale of Mitushide’s army broke first, and by sunset, their retreat became a rout. When the battle was over, it is said that Mitsuhide had just 700 men remaining. His exact fate isn’t clear; some say he was wounded and committed seppuku, while others suggest he was killed by vengeful peasants or bandits. Either way, his head was brought to Hideyoshi the day after the battle, and then displayed at Honnoji, a powerful statement confirming Hideyoshi as Nobunaga’s ‘avenger’ and giving an enormous boost to his credibility.

Hideyoshi would spend a few weeks stamping out the last embers of Mitushide’s rebellion, but despite his military successes, he was not unchallenged as Nobunaga’s successor. The other players, who had all been poised to strike, still remained in the field, and each had their own ambition to rule, either directly or through one of Nobunaga’s other sons.

This would result in the Kiyosu Conference, but we’ll cover that and its consequences next time.

Sources
https://ja.wikipedia.org/wiki/%E8%B1%8A%E8%87%A3%E7%A7%80%E5%90%89
https://ja.wikipedia.org/wiki/%E5%B1%B1%E5%B4%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E6%9C%AC%E8%83%BD%E5%AF%BA%E3%81%AE%E5%A4%89
https://ja.wikipedia.org/wiki/%E4%B8%AD%E5%9B%BD%E5%A4%A7%E8%BF%94%E3%81%97
https://ja.wikipedia.org/wiki/%E5%B1%B1%E5%90%8D%E5%A0%AF%E7%86%99
https://ja.wikipedia.org/wiki/%E4%B8%89%E6%9C%A8%E5%90%88%E6%88%A6
https://ja.wikipedia.org/wiki/%E6%9C%89%E5%B2%A1%E5%9F%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E5%A7%AB%E8%B7%AF%E5%9F%8E
https://ja.wikipedia.org/wiki/%E5%82%99%E4%B8%AD%E9%AB%98%E6%9D%BE%E5%9F%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E9%AB%98%E6%9D%BE%E5%9F%8E_(%E5%82%99%E4%B8%AD%E5%9B%BD)

February 20, 2026
The Second Unifier – Toyotomi Hideyoshi. Part One.

If the bird will not sing, make it sing.

Oda Nobunaga’s death in June 1582 left a power vacuum that was ultimately filled by Toyotomi Hideyoshi (then using the family name Hashiba). Hideyoshi’s tale is remarkable even by the standards of the time: from peasant footsoldier to master of the realm, he epitomised the danger and opportunity of the Sengoku Jidai and would be the man most responsible for bringing it to an end.

Hideyoshi’s origins are suitably mysterious and have been subject to a fair bit of speculation and mythologising, mostly by the man himself. After his rise to power, he is supposed to have spread the rumour that he was a secret bastard of the Emperor, stating that his mother had been a maid in the Imperial Palace and had “grown close to the Emperor’s Body”, which is quite the thing to say about your own mother.

Hideyoshi’s mother. She is often called Omandokoro, though this is the name she took after becoming a nun, and most sources think her birth name was Naka.

Less mum-shaming sources suggest that Hideyoshi was born in 1536 or 37 in Owari Province, now part of the modern city of Nagoya. His father, usually recorded as Kinoshita Yaemon, is a similarly mysterious figure, but historians generally agree he was probably of the lower classes, most likely a peasant soldier (Ashigaru). Hideyoshi’s childhood is also poorly recorded, with some sources suggesting his father died when he was 7, after which Hideyoshi entered a monastery, though he left shortly afterwards.

At the age of 15, he received part of his inheritance and left home to become a wanderer. Sometime later (the dates are unclear), he is recorded as Kinoshita Hideyoshi in the service of the Iio Clan, which, in turn, was a vassal of the Imagawa Clan. It’s not certain exactly when he came into the service of the Oda Clan, but it appears to have been before 1554, when he was serving at Kiyosu Castle (under Oda control) in charge of the kitchens, and in some kind of role in construction or maintenance.

Kiyosu Castle as it appears today.

Even this is a matter of some debate, though, as other sources state he didn’t join the Oda until 1558 (though they agree he served at Kiyosu Castle), and a common origin story in English language sources is that he was Nobunaga’s sandal bearer, a story which possibly reflects his role as a kind of ‘military servant’ which might explain how he was able to gain recognition from Nobunaga.

Even the matter of Hideyoshi’s marriage is subject to debate; it is certain that he married Nene, but her origins and even the year of the marriage aren’t totally clear. Some sources say the marriage took place in 1561, when Nene was 12 or 13, and Hideyoshi was in his 20s. This earlier date is controversial because even though 13 was the age at which girls became adults (legally speaking), it was still considered unusual for a girl to marry as soon as she came of age.

Hideyoshi’s wife, Nene, who also became a Nun, is often recorded as Kodai-in as a result.

Another theory is that the marriage took place in 1565, when Nene was 16 or 17, still young by modern standards, but a far more acceptable age at the time. Nene’s adoptive father was Asano Nagakatsu, who would later receive a stipend of 300 Koku from Nobunaga and served as one of his bodyguards. This status suggests that Nagakatsu was of sufficient rank, and the marriage to Nene is often cited as evidence that Hideyoshi was already moving up in the world by the mid-1560s.

As well as his marriage, further evidence of his rise in Nobunaga’s service appears in 1565 when his name appears as the co-signer on documents assigning fiefs, suggesting he was already one of Nobunaga’s most important vassals. Throughout the back half of the decade, he is recorded as having taken part in several of Nobunaga’s campaigns, notably taking Mitsukuri Castle during the Omi Campaign in 1568.

Omi Province.
_{^{By Ash_Crow – Own work, based on Image:Provinces of Japan.svg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1690755}}

In 1569, in support of the Mori Clan (who were his temporary allies), Nobunaga dispatched a force of some 20,000 to support them against a rebellion, whilst the bulk of the Mori forces were in Kyushu fighting the Otomo clan. This army, led by Hideyoshi, was, by all accounts, a phenomenal success, capturing no fewer than 18 castles in just 12 days and ending the rebellion swiftly.

A year later, he was part of Nobunaga’s campaign against the Asakura Clan of Echizen Province, which ended when Nobunaga’s brother-in-law, Azai Nagamasa, switched sides, threatening to cut off Nobunaga’s retreat. Though the exact scale of the threat is debated (as I mentioned in my posts on Nobunaga himself), what is certain is that Hideyoshi led the rearguard and was instrumental in ensuring that his master was able to escape.

Azai Nagamasa, Nobunaga’s brother-in-law, whose betrayal nearly spelt disaster for his campaign.

After the Battle of Anegawa, in which Nobunaga avenged himself on the Azai-Asakura forces, Hideyoshi was appointed castellan of the strategically important Yokoyama Fortress, from which he would be tasked with keeping up the pressure on the remnants of the Azai-Asakura until their final destruction in 1573.

I’ve previously mentioned the tradition of changing names among Samurai and how it often leads to confusion when you’re trying to source information about specific figures who may have had several names. While Hideyoshi is generally remembered as “Toyotomi Hideyoshi” in English-language sources, this wasn’t his name until much later. His peasant origins mean that he likely didn’t have a surname at all, and the names he was known by later were either taken from places or bestowed by others.

Shibata Katsuie

Niwa Nagahide

In 1573, Hideyoshi adopted the name Hashiba. The origins of this name are somewhat unclear; a common theory is that he took one character each from Shibata Katsuie and Niwa Nagahide (the Japanese character ‘wa’ can also be pronounced ‘ha’), though this is disputed.

Along with a name change, the fall of the Azai Clan in 1573 resulted in Hideyoshi receiving their former lands around the shores of Lake Biwa. He based himself at Imahama, which is promptly renamed Nagahama, after Nobunaga. This was not some unique quirk of his, by the way, the ‘giving’ of character from prestigious names was a common occurrence, and was generally treated as a respectful and honoured thing to do.

Nagahama Castle as it appears today.
_{^{By 663highland, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=73322120}}

He continued to play a significant role in Nobunaga’s military expansion, serving at the decisive Battle of Nagashino in 1575, and capturing Kiriyama Castle from the powerful Kitabatake Clan of Ise Province the next year. In 1577, Hideyoshi’s star seemed to be on an inexorable rise, but personal rivalries would get in the way.

Nobunaga dispatched an army under Shibata Katsuie to face Uesugi Kenshin in the north. Now, you may remember from my post about him, but Kenshin was a formidable opponent, a rival to both Hojo Ujiyasu and Takeda Shingen; he was certainly not a man to take lightly. Nobunaga obviously understood this and dispatched reinforcements commanded by Hideyoshi.

Uesugi Kenshin

At this point, a simmering feud between Hideyoshi and Katsuie exploded. The exact nature of the argument isn’t recorded in contemporary sources, and later writers could only speculate; however, it is known that Hideyoshi literally took his army and went home. This open defiance of Nobunaga’s orders would have been bad enough, but when Katsuie was defeated shortly afterwards at the Battle of Tedorigawa, Nobunaga was furious.

Hideyoshi was arguably lucky to keep his head after that, and he would spend some time in the political wilderness. His time would come again, however, and we’ll talk about that next week.

Sources
https://ja.wikipedia.org/wiki/%E8%B1%8A%E8%87%A3%E7%A7%80%E5%90%89
https://ja.wikipedia.org/wiki/%E6%89%8B%E5%8F%96%E5%B7%9D%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E9%95%B7%E6%B5%9C%E5%9F%8E_(%E8%BF%91%E6%B1%9F%E5%9B%BD)
https://ja.wikipedia.org/wiki/%E9%9C%A7%E5%B1%B1%E5%9F%8E
https://ja.wikipedia.org/wiki/%E9%87%91%E3%83%B6%E5%B4%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E5%A7%89%E5%B7%9D%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E6%A8%AA%E5%B1%B1%E5%9F%8E_(%E8%BF%91%E6%B1%9F%E5%9B%BD)
https://ja.wikipedia.org/wiki/%E4%B8%B9%E7%BE%BD%E9%95%B7%E7%A7%80
https://ja.wikipedia.org/wiki/%E8%A6%B3%E9%9F%B3%E5%AF%BA%E5%9F%8E%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E9%AB%98%E5%8F%B0%E9%99%A2
https://ja.wikipedia.org/wiki/%E6%B5%85%E9%87%8E%E9%95%B7%E5%8B%9D
https://ja.wikipedia.org/wiki/%E9%A3%AF%E5%B0%BE%E6%B0%8F
https://ja.wikipedia.org/wiki/%E5%A4%A7%E6%94%BF%E6%89%80

February 13, 2026
The Hosokawa Rebellion

As we’ve looked at previously, internal clan conflict wasn’t uncommon during the 15th century; in fact, it had gotten to the point that violent succession struggles were almost a fact of life. One exception to this rule had been the Hosokawa Clan.

In the mid-15th Century, the Hosokawa were just one of several powerful clans that dominated the area around Kyoto, the centre of political power in the realm. While other clans had risen and fallen throughout the Century, the Hosokawa went from strength to strength, in large part because they managed to maintain a stable succession, leading to one of their number, Hosokawa Masatomo, being strong enough to launch the Meio Coup in 1493, giving him effectively complete control of the government and what was left of its prestige.

Hosokawa Masatomo, who arguably led his clan to the height of its power, and laid the groundwork for its downfall.

The relative stability of the Hosokawa Clan came to an end with Masatomo, however. He had succeeded his father largely because he had been the only viable candidate and had earned the support of his clan’s vassals after his father’s death. Masatomo apparently didn’t learn from this, however. Firstly, his spiritual beliefs meant that he swore off contact with women, which rather limited his opportunities to father an heir.

This was no problem, though; adoption was(and continues to be) a widely accepted custom amongst the rich and powerful in Japan, and all Masatomo had to do was select a candidate who could earn the support of the wider Hosokawa Clan, and their position would be (relatively) secure.

It must have come as quite a shock then, when Masatomo adopted not one, but three sons. To be fair, he didn’t adopt them all at once, and most contemporary sources speculate that his intentions were to split the Hosokawa lands between his new heirs, but you won’t be surprised to learn that it didn’t work out that way.

No sooner was the ink dry on the adoption documents than rival factions began to form around the three potential heirs. Masatomo didn’t help matters by clearly favouring one son, Sumitomo, over the other two, but the whole situation would have been precarious even under the best of circumstances, and the Hosokawa certainly didn’t enjoy those.

Hosokawa Sumitomo, Masatomo’s apparently preferred heir.

We’ve looked at the wide-ranging political problems the Shogunate faced during the latter half of the 15th century, and when Masatomo seized control of the government, he also inherited those problems. It’s hard to see how even the most focused, capable, and diplomatic leader might have reversed the situation the Shogunate found itself in, and unfortunately for the Hosokawa, Masatomo was an eccentric iconoclast, prone to doing things like attempting to fly, deriding long-standing ceremonies, and generally making political enemies wherever he went.

It is a strange quirk of human history, though, that factions who seem to have hostile (and often violent) intentions towards each other will exist in a kind of tense equilibrium as long as there is someone, or something, that they can focus their ire on. In the early 16th century, that someone was Masatomo.

None of the three factions was strong enough to openly oppose him, because if they had, they’d have been attacked and wiped out by the other two, who would need little encouragement to remove a rival, even if that meant supporting Masatomo in the short term.

It is also true that, eventually, the dam always breaks, and when it comes to court politics, that usually means blood. In June 1507, supporters of one of Masatomo’s adopted sons (Sumiyuki) assassinated him in his bathhouse. The next day, they attempted to do the same thing to another son, Sumitomo, but he managed to escape with the help of his allies in the Miyoshi Clan.

Just a moment ago, I mentioned that one faction couldn’t make a move without antagonising the other three, and that’s exactly what happened. Sumiyuki’s supporters had tried to remove Sumitomo and failed. Now, Sumitomo fled Kyoto and sought the aid of the third brother, Takakuni, who was only too happy to oblige.

The stylised end of Hosokawa Sumiyuki.
_{^{Musuketeer.3 – 投稿者自身による著作物, CC 表示-継承 3.0, https://commons.wikimedia.org/w/index.php?curid=24893374による}}

The combined forces of Takakuni and Sumitomo were indeed too much for Sumiyuki, and by August, he had been defeated and forced to commit suicide. The question then was who would actually succeed Masatomo. Both Takakuni and Sumitomo could arguably claim to have avenged their adopted father’s death, and both had significant support from the remaining Hosokawa retainers.

As we mentioned last time, it is at this point that the previously deposed Shogun, Yoshitane, returned to the scene. Given that Masatomo had overthrown him in a coup and installed a puppet, it wasn’t difficult to convince Shogunate loyalists to side with Yoshitane. Suddenly, becoming heir to the Hosokawa Clan wasn’t quite the prize it had been. Though Sumitomo was in the stronger position, he now faced a resurgent Yoshitane, and his brother, Takakuni, saw the way the wind was blowing and threw in his lot with the returning Shogun as well.

Just as Sumiyuki had been unable to oppose the combined forces of his brothers, Sumitomo did not have the strength to challenge the Shogun and Takakuni. Sumitomo also lost considerable support due to the actions of his supporters in the Miyoshi Clan, who had become overbearing in the short period after their victory.

So, in April 1508, when Yoshitane and Takakuni marched on Kyoto, Sumitomo and the Miyoshi had little choice but to flee with their puppet Shogun, Yoshizumi. Shortly after this, Yoshitane was reinstated as Shogun, and Takakuni was named the new head of the Hosokawa Clan.

The once and future Shogun, Yoshitane, picked the right moment to return to the political scene.

In June the following year, Sumitomo and the Miyoshi attempted to retake the city but were defeated and driven back; however, a counterattack led by Yoshitane was similarly defeated. The back-and-forth nature of the conflict continued until the Battle of Ashiyagawara (sometimes called the Siege of Takao Castle), in the summer of 1511, after which Sumitomo’s victorious forces were able to briefly reoccupy Kyoto.

‘Briefly’ is the operative word here, because in September of the same year, Takakuni and Yoshitane’s forces counterattacked, retook Kyoto, and drove Sumitomo and the Miyoshi back to their strongholds in Awa Province, across the Inland Sea on Shikoku.

Awa Province.
_{^{By Ash_Crow – Own work, based on Image:Provinces of Japan.svg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1652119}}

Around this time, Yoshizumi died of illness, and Sumitomo suffered a serious loss of support. Many of his allies had supported Yoshizumi as Shogun, and Sumitomo as his champion, but now Yoshizumi was gone, Yoshitane, who was now firmly entrenched in Kyoto, was the only remaining claimant to the title, and many Shogunate loyalists deserted to him, weakening Sumitomo and strengthening Takakuni.

Ashikaga Yoshizumi, whose death proved that a puppet shogun is better than no Shogun at all.

This stalemate did not mean peace, however, and constant, low-level fighting would continue throughout the region and the wider realm; what would later be called the Sengoku Jidai was already well underway, even if the area immediately around Kyoto was relatively quiet.

In 1517, the stalemate was broken when Miyoshi forces in support of Sumitomo invaded Awaji and used it as a springboard to threaten the mainland. Around this time, the Ouchi Clan, who had supported Takakuni and Yoshitane for the better part of 10 years, left the capital to deal with unrest in their home provinces, caused by the apparent resurgence of Sumitomo and the Miyoshi’s faction.

The departure of the Ouchi was a major blow to Takakuni, and over the next two years, he saw his position gradually chipped away, as forces defected to Sumitomo or simply abandoned the fight to deal with their own affairs. Finally, in early 1520, Shogun Yoshitane himself switched sides, throwing his support behind Sumitomo and forcing Takakuni to flee Kyoto.

Ouchi Yoshioki, the head of the Ouchi Clan, whose decision to leave Kyoto seriously weakened Takakuni.

Takakuni fled to Omi Province, but he wasn’t ready to roll over just yet. Gathering a force of his allies, he counter-attacked in May 1520 and retook the capital. This time, his victory was decisive; he forced the leader of the Miyoshi Clan to commit suicide and even managed to drive Sumitomo back into exile on Shikoku, where he died of illness shortly afterwards.

The following year, Takakuni exiled the fickle Yoshitane and installed Ashikaga Yoshiharu, the son of Yoshizumi, as Shogun, though he was just as much a puppet ruler as his father had been. Takakuni was appointed kanrei (deputy) for the new Shogun’s enthronement ceremony, but would resign the position immediately afterwards, proving to be the last man to hold the position, according to historical records.

It wouldn’t be until October 1524 that the last embers of Miyoshi resistance were stamped out on Shikoku, but even then, Takakuni was far from secure in his position. In 1526, he faced serious opposition from within his own clan and was defeated when he tried to march against them. In 1527, this combined force actually managed to drive Takakuni out of Kyoto, and an attempted counterattack was defeated at the Battle of Katsuragawa in March that year.

Takakuni, ever tenacious, refused to give up, despite being defeated in 1528 and again in 1530. Things finally came to a head for him in 1531, at the Battle of Tennoji, which is often called the Daimotsu Kuzure, which can be translated as “The Fall of the Big Shots” (lit. big names fall, or collapse).

The Battlefield Memorial of the Fall of the Big Shots.

Takakuni was defeated. He survived the battle but was captured shortly afterwards, supposedly whilst hiding in an indigo storage barrel at a dye shop, after which he was obliged to commit suicide. Several of his main supporters (the eponymous “Big Names”) suffered similar fates, and Takakuni’s faction disintegrated.

Takakuni’s body was likely still warm (and probably blue, given his hiding place) when the forces that had opposed him turned on each other. Members of the Hosokawa, Hatakeyama, and Miyoshi Clans all began fighting, and any hope of retaining a stable government in Kyoto was lost.

Sources
https://ja.wikipedia.org/wiki/%E6%B0%B8%E6%AD%A3%E3%81%AE%E9%8C%AF%E4%B9%B1
https://ja.wikipedia.org/wiki/%E5%A4%A7%E7%89%A9%E5%B4%A9%E3%82%8C
https://ja.wikipedia.org/wiki/%E6%A1%82%E5%B7%9D%E5%8E%9F%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E8%B6%B3%E5%88%A9%E7%BE%A9%E6%99%B4
https://ja.wikipedia.org/wiki/%E7%AD%89%E6%8C%81%E9%99%A2%E3%81%AE%E6%88%A6%E3%81%84
https://ja.wikipedia.org/wiki/%E8%8A%A6%E5%B1%8B%E6%B2%B3%E5%8E%9F%E3%81%AE%E5%90%88%E6%88%A6
https://ja.wikipedia.org/wiki/%E8%88%B9%E5%B2%A1%E5%B1%B1%E5%90%88%E6%88%A6
https://ja.wikipedia.org/wiki/%E4%B8%8B%E7%94%B0%E4%B8%AD%E5%9F%8E
https://ja.wikipedia.org/wiki/%E8%B6%B3%E5%88%A9%E7%BE%A9%E6%BE%84
https://ja.wikipedia.org/wiki/%E5%A4%A7%E5%86%85%E7%BE%A9%E8%88%88

October 21, 2025
The Eisho Disturbance

Last time, we looked at the Meio Coup that saw the Shogun’s kanrei (deputy), Hosokawa Masatomo, take over the government and install a puppet Shogun with himself in effective control. At the end of that post, we also looked at how, despite the coup’s success, Masatomo’s grip on power was far from secure.

Hosokawa Masatomo, the most powerful man in the realm following the Meio Coup.

As soon as the dust settled, Masatomo found himself surrounded by problems. Some had been long-standing, violence between powerful clans in the provinces had been a problem for decades, and Shogunate authority outside of Kyoto was tenuous at best.

Within Kyoto, too, there were enduring rivalries between different factions, sometimes within the same family, all revolving, as it always had, over who would control the throne, or the man (it was always a man) sitting on it. In many ways, Masatomo’s coup can be seen as a continuation of political instability that went back centuries. As long as there had been an Imperial Throne (nearly a thousand years at this point), there had been powerful families vying to control it. That situation hadn’t really changed when the centre of power became the Shogun instead of the Emperor.

Some of the problems were of Masatomo’s own making, though. He was, but most contemporary accounts describe him as an authoritarian and quite eccentric character. It is easy for us to imagine the Shogun as some all-powerful ruler, but the reality was that there was a considerable amount of power sharing in the capital. This was no democracy, but it was also expected that the powerful clans surrounding the throne would be consulted about government matters and have their seat at the table when it came to running things.

There had been several examples of powerful families coming to dominate the government, and again, Masatomo was just continuing that trend, but like the families who came before him, centralising all power in one man attracted a lot of hostility from the other clans who now found themselves frozen out.

The other problem with Masatomo was that he was something of an eccentric iconoclast. A follower of the ascetic Shugendo sect of Buddhism, he lived an austere life, swearing off certain foods, all alcohol and the company of women, though some contemporary sources suggest his aversion to sex wasn’t limited to his male companions, and he was apparently a practitioner of shudo, a kind of ritualised homosexuality that was common amongst Samurai.

Modern day practitioners of Shugendo, of which Masatomo was a keen adherent.
_{^{By 唐山健志郎 (Kenshiro Karayama) – 唐山健志郎 (Kenshiro Karayama), CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2259089}}

Masatomo is supposed to have believed that his religious fervour would allow him to engage in magical feats, such as being able to fly or speak mystical languages. He had more practical eccentricities as well; he would go on long journeys, sometimes alone, and without telling his retainers, meaning that government would effectively come to a halt until he could be found.

Religious and sexual habits aside, Masatomo also opposed much of the pomp and ceremony surrounding the institutions of government. It is said that he disliked the formal clothing required at certain ceremonies, and the official enthronement of the new Shogun was delayed simply because Masatomo refused to wear the eboshi hat required by tradition.

A 17th Century depiction of an official wearing the eboshi hat that Masatomo despised.

Masatomo also had a shockingly (for the time) rational approach to the Imperial Court as well. He is supposed to have opposed the enthronement ceremony of Emperor Go-Kashiwabara on the grounds that, since the Emperor no longer had any real power, there was no point in a grand ceremony. This was technically true, but flew in the face of long-established tradition.

So a combination of Shogunate weakness, Political problems, and personality issues meant that Masatomo’s position was never strong, and he wouldn’t help matters with some of the decisions he made. Given Masatomo’s apparent aversion to women, he wasn’t able to produce an heir (obviously). This problem wasn’t an uncommon one at the time, and adoption was usually the preferred solution.

Masatomo, never one to do anything the easy way, adopted three sons, Sumimoto, Sumiyuki, and Takakuni. You may remember, in the period leading up to and including the Onin War, one of the key factors in the instability that gripped the realm was the frequency of internal conflict over clan succession. One of the reasons the Hosokawa Clan had been able to take such a strong position was that they had largely been able to avoid these struggles, with Masatomo succeeding his father relatively smoothly.

Some contemporary sources suggest that Masatomo’s ultimate plan was to divide the Hosokawa lands between two of these sons, while the third would inherit the position of kanrei and thus real political power. Initially, it seems that Masatomo favoured Sumimoto to succeed him as kanrei, but the fact that all three ‘sons’ came from three different families meant that the succession was now the subject of growing factional rivalries.

Hosokawa Sumitomo, Masatomo’s choice as heir.

This situation was precarious, but held together by the sheer force of Masatomo’s will. With power centralised in his hands, he could exert enormous control over what remained of the Shogunate government and its nominal loyalists. This way of doing things required him to be alive, however, which he no longer was after June 23rd, 1507, when he was assassinated.

The assassins were apparently partisans of Sumiyuki, favouring him as kanrei over Sumitomo, who they also attacked at the same time as his father, though Sumitomo was able to escape with the help of his supporters, led by members of the Miyoshi Clan (a name that will become important later).

The fact that Sumitomo survived was a problem for Sumiyuki, especially after he fled to Takakuni, the third brother, who agreed to support him and march against Sumiyuki. There was a series of blood battles between the rival factions until Sumitomo’s supporters, led by Miyoshi Yukinaga, took his final refuge at Yushoken, forcing Sumiyuki to commit suicide.

An image depicting Sumiyaki at the moment of his death.
_{^{Musuketeer.3 – 投稿者自身による著作物, CC 表示-継承 3.0, https://commons.wikimedia.org/w/index.php?curid=24893374による}}

It turns out that your enemy’s enemy isn’t always your friend, though, and it wasn’t long before Takakuni and Sumitomo were at each other’s throats. The problem stemmed from Sumitomo’s supporters amongst the Miyoshi Clan, whose strength and growing overbearingness earned them many jealous rivals. Then, in late 1507, former Shogun Yoshitane (who had fled after the Meio Coup) returned to the scene.

Yoshitane, after fleeing into exile, had been supported by the Ouchi Clan based in modern-day Yamaguchi Prefecture, and now they raised their banners in support of his march on Kyoto. Although not strong enough to take the city at first, shortly after the new year, Takakuni became the focal point for anti-Miyoshi feeling and chose to throw in his lot with the old Shogun.

This combined force attacked Kyoto and took the city in early April, forcing Sumitomo and Shogun Yoshizumi to flee. Takakuni was recognised as the new head of the Hosokawa Clan, and Yoshitane was reinstated as Shogun, beginning his second reign.

Sumitomo and Yoshizumi were down but not out, however, and what followed was more than 20 years of strife that is collectively called the Hosokawa Civil War, or Hosokawa Rebellion. This conflict had all the hallmarks of the internal violence that had wracked multiple clans throughout this period, but wrought on a massive scale, involving not just the Hosokawa but their vassals, retainers, and the Shogunate itself.

Sources
https://ja.wikipedia.org/wiki/%E6%B0%B8%E6%AD%A3%E3%81%AE%E9%8C%AF%E4%B9%B1
https://ja.wikipedia.org/wiki/%E7%B4%B0%E5%B7%9D%E9%AB%98%E5%9B%BD
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https://ja.wikipedia.org/wiki/%E7%B4%B0%E5%B7%9D%E6%94%BF%E5%85%83

October 16, 2025
The Power in the Provinces Part Two

Western Japan

Western Japan was, much like the Kanto, away from the centre of power, but still close enough to be a perpetual source of trouble.

The Ouchi

The mon of the Ouchi Clan
_{^{By Mukai – No machine-readable source provided. Own work assumed (based on copyright claims)., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7845833}}

At the end of the 15th Century, the Ouchi Clan were one of the strongest in Japan. Based at Yamaguchi, in the furthest west of ‘The West’, they were in an enviable position. Their centre of power was far enough away from Kyoto that they were often spared the worst of the destruction, and the city of Yamaguchi, positioned as it was, near the coast, was a prime location for getting involved in the trade with China and Korea.

These close links to mainland Asia go back into the mists of time. Unlike many other clans, the Ouchi did not claim descent from one of the ‘Imperial’ Clans (Fujiwara, Minamoto, or Taira). Instead, they claimed as their ancestor a Korean prince, Prince Imseong, although the long years involved make a definitive link impossible to prove.

During the Nanbokucho Period, the Ouchi proved to be staunch supporters of the Northern Court and the Ashikaga Shoguns, earning them rich rewards, and by the time of the Onin War, they had extended their control into Northern Kyushu, officially on behalf of the Shogun, but effectively ruling their little empire independently.

During the Onin War, the Ouchi sided with the Yamana Clan and the Western Army. In fact, after the decline of the Yamana during the war, it was the Ouchi who stepped forward and played the leading role in securing Western military victories in the West. When the war ended, the Ouchi regained control of their former territories in northern Kyushu, and would continue to be one of the leading powers at the dawn of the 16th Century.

Their links to international trade continued during this period as well, in fact, during the mid-16th Century, they would prove to be one of the key clans in what became called “Nanban trade”, literally the “Southern Barbarian Trade”, the ‘Barbarians’ in this case, being the Portuguese, who arrived in Japan in the 1540s.

Despite their wealth and power, the Ouchi would eventually become overstretched. Facing powerful clans in Kyushu and nearer to home, they would initially see success, crushing the Shoni Clan of Kyushu in 1536, and facing the Amago Clan of Izumo Province in 1541. An initial victory over the Amago was followed by a serious defeat in which the Ouchi clan’s heir was killed.

Ouchi Yoshitaka, who oversaw the decline of his clan.

After this, the head of clan, Yoshitaka, began neglecting affairs of government, and the Ouchi would enter a period of steep decline. In 1551, Yoshitaka was killed in a rebellion, and over the next five years, the Ouchi’s once expansive domains were chipped away, as rivals took advantage of the chaos, and even formerly loyal vassals (most notably the Mori Clan) went their own way, often violently.

The Ouchi would enter terminal decline from this point. There was a brief attempt at a restoration in 1569, but it was crushed by the Mori, and the original Ouchi Clan ceased to exist. A supposed branch of the family, the Yamaguchi Clan, would survive as rulers of the Ushiku Domain, in modern Ibaraki Prefecture, but they appear to have died out in the male line in 1991.

The Mori

The mon of the Mori Clan.
_{^{Kashiwamon – 投稿者自身による著作物, CC 表示-継承 4.0, https://commons.wikimedia.org/w/index.php?curid=91163213による}}

Like the Hojo in the Kanto Region, the Mori were arguably the most successful clan based in Western Japan. Despite this, the origins of the clan are actually in Sagami Province, close to the modern city of Atsugi in Kanagawa Prefecture. From there, the clan would branch off (as they always seem to) into several different ‘Mori’ Clans, but the one we are focusing on here is the ‘Aki Mori’ Clan, which came to be based in Aki Province in what is today Hiroshima Prefecture.

During the period of the Kamakura Shogunate, the Mori clan remained largely aloof, and when the Emperor Go-Daigo overthrew the Kamakura, the Mori did not get involved. This actually worked against them as Go-Daigo adopted a “With me or against me” approach, and the Mori temporarily saw their territories forfeit.

This backfired pretty spectacularly when, just three years into the “Kenmu Restoration”, Emperor Go-Daigo himself was overthrown by the Ashikaga Family, leading to the establishment of the eponymous Shogunate, and the Mori (who had helped the Ashikaga) being restored to their lands.

Much like every other major Samurai family, the Mori broke up into several branch families that would often end up fighting each other. Their situation in the mid-15th Century was further weakened by the presence of the powerful Ouchi and Amago Clans in the region.

Through the late 15th Century, the Mori would find themselves caught between these two powers, but in the 16th Century, several savvy political marriages and a few adoptions improved their position considerably, and they would eventually rise to eclipse their former masters, the Ouchi, entirely.

Mori Motonari, the man who would lead his clan to the height of their power.

Throughout the Sengoku Period, the Mori would become the power in the West in the same way the Hojo were the power in the East. When Oda Nobunaga (him again!) drove the last Ashikaga Shogun out of Kyoto in 1576, he sought protection from the Mori, who would remain Nobunaga’s chief rivals in the West until his death (spoilers) in 1582.

The Mori would make peace with Nobunaga’s successor, Toyotomi Hideyoshi and remain a major power, eventually establishing their base at Hiroshima. However, the final battles of the Sengoku period would see the Mori choose the losing side, and they were eventually reduced to just two provinces, which became known as the Choshu Domain.

There they would remain, implacably opposed to the new government, but far enough away from the capital to be too much trouble to get rid of. During the Meiji Restoration in the 19th Century, it was Choshu, and the Mori clan, who would play a leading role in the modernisation of Japan, but that’s a story for another time.

The Mori family continued through this period and into the modern era, with the current head being Mori Motohide, who works for Hitachi Steel Works, and became the family head in 2020.

The Amago

The mon of the Amago Clan

The Amago were a branch of another clan, the Kyogoku, who were themselves descended from the Sasaki Clan, whose progenitor was a son of the Emperor Uda, who ruled in the late 9th century.

Emperor Uda, who ruled from 887-897. The Amago claimed him as their illustrious ancestor.

The Amago Clan themselves were a relative latecomer; their direct ancestor (the ‘first’ Lord Amago) was Takahisa, who took the name Amago for the area (near Kyoto) where he had his manor. In the early 15th Century, he was appointed as the deputy governor (shugo-dai) of Izumo Province (in modern Shimane Prefecture) on behalf of the Kyogoku Clan, who were obliged to reside in Kyoto.

We’ve discussed in previous posts how the Shogun’s policy of demanding that Shugo reside in Kyoto led to the rise of independently minded deputies; well, the Amago are one of them. Although officially only deputies, the Amago would take advantage of the chaos of the Onin War to consolidate their power, and by the time the war ended, they were in effective control.

When the Kyogoku line became extinct in 1514, with the death of the last lord, the Amago graduated from de facto to actual lords of Izumo, and it would be there that they based their power. The rise of the Amago was initially opposed by the Ouchi, and throughout the early 16th Century, they would engage in something of a hostile coexistence, neither side quite able to overcome the other, with the Ouchi focusing on the west, whilst the Amago had their eyes to the east.

The Amago would eventually rise to be the masters of eight provinces in the region, but in the 1540s, the rise of the Mori clan would lead to the decline of the Ouchi and directly threaten the Amago. The conflict between these clans would drag on for nearly 40 years, but the Mori would eventually prevail, with the surviving members of the Amago family serving as retainers for the Mori throughout the Edo Period.

The family itself would survive until 1940, when the last head of the clan passed away without an heir.

The Akamatsu

The mon of the Akamatsu Clan
_{^{By お茶飲む人 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=53365103}}

Unlike many of the other clans we’ve been looking at, the Akamatsu Clan were a family that peaked early, and then never really recovered. The exact origins of the clan are disputed, with some sources suggesting they descended from the Minamoto Clan, whilst others refute this, leading to some confusion.

What is not disputed is that the Akamatsu Clan originally supported the Emperor Go-Daigo during the short-lived Kenmu Restoration, earning Harima Province for their trouble, only for the province to be forfeited shortly afterwards during Go-Daigo’s controversial “Alienate everyone as quickly as possible” policy, which saw him overthrown by the Ashikaga Shogunate after just three years.

The Akamatsu, thoroughly alienated as they were, sided with the Ashikaga and had Harima Province restored to them after their victory, and the clan would be steadfast loyalists of the new Shogunate, at least for a while. The Akamatsu remained faithful, but in 1429, a serious peasant revolt in their home province badly weakened them, and not long after that, the Shogun, Yoshinori, came to the throne and proved to be an effective, but extremely paranoid ruler.

The exact reasons for the so-called Kakitsu Rebellion are unclear, but members of the Akamatsu Clan assassinated the Shogun in 1441, after which they raised an army only to be crushed by the Shogunate army shortly afterwards.

Branches of the family would survive, and after conspicuous service during the Onin War, the Akamatsu were actually restored to control of Harima Province. For a while, things were looking up. By 1488, the head of the clan, Masanori, had established control of three provinces, and there was every indication that the Akamatsu would enter the 15th century as one of the major players.

You’ve probably already guessed that that isn’t what happened, though, and you’d be right, good on you for paying attention. Masanori died suddenly in 1496, and his heir was just four years old, meaning that the clan fell into the hands of so-called ‘Elders’ who were supposed to rule until the little lord came of age.

Akamatsu Masanori, who might have held things together for his clan, if he’d lived.

This might have worked in more peaceful times, but in the early days of the Sengoku Jidai, it led to chaos. Before long, different factions of the clan were fighting each other, and the Akamatsu entered a period of steady decline. Even after the lord, Yoshimura, came of age, he couldn’t change the situation.

It got so bad that Yoshimura was first forced to abdicate in 1521 and was then assassinated shortly afterwards. His son, Harumasa, was young and easier to control, which might be why the ‘elders’ favoured him as ruler.

There was a brief resurgence in 1531, when Harumasa managed to establish his own rule, but years of infighting had effectively bled the Akamatsu dry, and in 1537, the neighbouring Amago Clan invaded and conquered the Akamatsu’s home province of Harima.

The Akamatsu would return to Harima, but they were never able to establish control of the whole province ever again, and throughout the 16th century, their power was gradually eroded away, until 1568, when they made the somewhat short-sighted decision to resist Oda Nobunaga, who promptly crushed them and took Harima for himself.

Branches of the family would survive in one form or another, but they never ruled large territories again. In the modern era, a descendant of the clan, Akamatsu Yoshinori, served in several high positions in the Imperial Navy, eventually being granted the title of Baron. His descendants are still going today, although there’s not a lot of information available online.

Sources
https://en.wikipedia.org/wiki/%C5%8Cuchi_clan
https://ja.wikipedia.org/wiki/%E5%A4%A7%E5%86%85%E6%B0%8F
https://reichsarchiv.jp/%E5%AE%B6%E7%B3%BB%E3%83%AA%E3%82%B9%E3%83%88/%E7%89%9B%E4%B9%85%E5%B1%B1%E5%8F%A3%E6%B0%8F
https://en.wikipedia.org/wiki/M%C5%8Dri_clan
https://ja.wikipedia.org/wiki/%E6%AF%9B%E5%88%A9%E6%B0%8F
https://ja.wikipedia.org/wiki/%E6%AF%9B%E5%88%A9%E5%85%83%E6%95%AC
https://ja.wikipedia.org/wiki/%E6%AF%9B%E5%88%A9%E5%85%83%E6%A0%84
https://ja.wikipedia.org/wiki/%E5%B0%BC%E5%AD%90%E6%B0%8F
https://en.wikipedia.org/wiki/Akamatsu_clan
https://ja.wikipedia.org/wiki/%E8%B5%A4%E6%9D%BE%E6%B0%8F

October 2, 2025