Chris Perry, Author

Tag: Mongol Invasions of Japan

  • The Shimazu, Part 1

    The Shimazu, Part 1

    Last time we looked at Shikoku, the so-called ‘four provinces’, well, how about an island of nine provinces? That’s right, Kyushu, the third largest of Japan’s main islands, is so called because in the pre-modern period it was home to nine whole provinces, which means, as names go, it’s not terribly creative, but what can you do?

    Kyushu.
    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=16385933

    In ancient times, Kyushu had been the centre of cultural, economic, and social development in Japan, as its close proximity to Korea, and by extension China, made it the logical landing site for innovations as widespread as rice farming and written language. The island would also be the focus of two ultimately unsuccessful Mongol invasions in the 13th Century, and the Shogunate administration there would continue to be important until the decline of central authority in the 15th Century left Kyushu, much like the rest of the realm, effectively independent.

    Into this power vacuum stepped several powerful clans, with the most prominent arguably being the Ouchi, Otomo, and Shimazu. Though the Ouchi and Otomo would play important roles of their own in the story of the Sengoku Period, it is the Shimazu that we will be focusing on.

    The exact origins of the Shimazu name aren’t entirely clear, but the first figure to take the name was Tadahisa, who was made lord of the Shimazu Manor in southern Kyushu in 1185. Tadahisa himself is something of a mysterious figure, with various conflicting reports of his origins, parentage, and even his name, but what is clear is that the Shimazu were well established in southern Kyushu by the 13th century, and would use it as their base going forward.

    Shimazu Tadahisa, the first “Lord” Shimazu.

    Tadahisa’s son, Tadatoki, seems to have been an accomplished military leader, as he was appointed the shugo (military governor) of Satsuma, Osumi, and Hyuga Provinces, all of southern Kyushu in effect. He was also granted numerous prestigious lands and titles around the realm, but it was his Kyushu holdings that would be the most important for his descendants.

    The Shimazu’s fortunes would ebb and flow over time, but the distance of their lands from the centre of power in Kyoto meant that they were often able to weather the storms of early Medieval Japan. They were not immune from the ever-present problem of internal conflict, however, and by the time of the Onin War in 1467, the Shimazu were weak, divided, and vulnerable.

    It would be Shimazu Tadayoshi (1492-1568) who would begin to turn the fortunes of the clan around. Originally from the Isaku Clan (a branch of the Shimazu), Tadayoshi had a difficult start to life. His father, Yoshihisa, was apparently murdered by a stable hand when Tadayoshi was just two, and his grandfather was killed in battle in 1500. Following this, Tadayoshi’s mother, Lady Baiso, agreed to marry the lord of another branch of the Shimazu, on the condition that Tadayoshi be adopted as heir to both branches. The lord in question was apparently so keen on Lady Baiso that he agreed.

    Shimazu Tadayoshi.

    Tadayoshi proved to be an enlightened and capable ruler, taking inspiration from Zen teachings and humanitarian principles. He was a popular leader, as he genuinely cared for the needs of his retainers and the welfare of his territory, but his son, Takahisa, would prove to be greater still. In 1526, following the deaths in quick succession of both his sons, the head of the main branch of the Shimazu Clan, Katsuhisa, turned to Tadayoshi (renowned for his learning and upright conduct) for a solution to the succession issue.

    Tadayoshi had Takahisa adopted by the Lord of the Shimazu. In November 1526, Katsuhisa handed over control of the Shimazu Clan to Takahisa and retired to a monastery. Tadayoshi became a monk himself shortly afterwards and would go on to play a significant role in aiding his son in reestablishing Shimazu power in southern Kyushu.

    Shimazu Takahisa.

    Things are never quite that simple, however, and Takahisa’s accession to the leadership of the Shimazu was opposed by several powerful retainers, some of whom also claimed the right to lead. Katsuhisa himself also seems to have expressed some regret about handing over power, and in June 1527, an army was raised which drove Takahisa out, and had Katsuhisa returned as the shugo.

    The fighting would go back and forth for a while after this, despite unsuccessful efforts to arrange a reconciliation in 1529. Katsuhisa proved to be an unpopular lord, however, apparently being more focused on ‘vulgar entertainment’ than the business of ruling. Though this did not automatically translate into support for Takahisa, the division amongst his enemies handed him the initiative.

    Starting in 1533, Takahisa would lead a series of counter-attacks which eventually saw him establish control over most of Satsuma Province, and in 1539, the decisive Battle of Murasakihara saw Takahisa drive out his primary rivals, though it wouldn’t be until 1552 that he was finally recognised as the shugo of Satsuma Province by the Shogunate, 26 years after he had first assumed the mantle.

    Satsuma Province, home of the Shimazu Clan.
    By Ash_Crow – Own work, based on Image:Provinces of Japan.svg, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1691755

    Takahisa had long hoped to reestablish Shimazu control of the three provinces held by his ancestors, and he would lead campaigns into neighbouring Osumi province from 1554 to 1556, which would allow him to establish a foothold in the province from which further expansion could be launched.

    Though Takahisa would prove to be a successful warrior, he was also known for his outward-looking attitude towards foreigners. The Shimazu had long had trade with Ming China, largely through intermediaries in the Ryukyu Islands (modern Okinawa), and after Portuguese merchants arrived in Japan, Takahisa was one of the first lords to welcome them to his domains, and perhaps one of the first to employ firearms in battle.

    He would also go some way to establishing Christianity in Japan, as he welcomed Francis Xavier into his territory in 1549, though this would ultimately prove a short-lived association, due to backlash from conservative elements amongst the Buddhist and Shinto priesthoods.

    A later depiction of a Portuguese trading ship in Japanese waters.

    Takahisa would eventually retire to a monastery in 1556, handing control of the Shimazu over to his son, Yoshihisa, who also inherited his father’s ambitions to regain control of the three provinces of Satsuma, Osumi, and Hyuga. Yoshihisa had actually joined his father’s campaign in Osumi, making his ‘debut’ in 1554, and after inheriting the leadership from his father, he would continue the campaigns to fully pacify Satsuma and expand Shimazu holdings into the neighbouring provinces.

    Satsuma would come under his complete control in 1570. In 1572, a rival clan from Hyuga Province would invade Shimazu territory, only to be defeated in short order at the Battle of Kizakihara, with the Shimazu forces being led by Yoshihisa’s highly capable younger brother, Yoshihiro. It is said that the Shimazu, despite being outnumbered 10 to 1, launched an aggressive attack against the enemy, which saw several key leaders killed and over 500 enemy deaths (counted in heads taken after the battle).

    A later depiction of a head viewing (kubi-jikken), a common practice among Samurai, in which the heads of defeated enemies would be presented to lords, or otherwise publicly displayed.

    This victory allowed Yoshihisa to focus on Osumi Province, which he was able to fully conquer by the end of 1573. Then in 1576, he captured the strategically important Takahara Castle, held by the powerful Ito Clan of Hyuga. The fall of Takahara led to a domino effect in which the remaining 48 castles of the Ito Clan were either conquered or defected to the Shimazu. Not long after, the head of the Ito Clan, Yoshisuke, fled Hyuga, and the long-dreamt-of reunification of the three provinces was achieved.

    Almost as soon as the dust had settled, however, the powerful Otomo Clan, who controlled several provinces in North-Eastern Kyushu, invaded, nominally in support of the exiled Yoshisuke, but more likely in an opportunistic attempt to expand their own territory. A huge army of some 43,000 men crossed into Hyuga Province in October 1578 and laid siege to Takashiro Castle. The Shimazu under Yoshihisa could muster only 20,000 men in response, but they took advantage of poor coordination amongst the Otomo, dealing with the invaders piecemeal.

    The campaign culminated in the Battle of Mimikawa (which was actually fought nearly 20 miles from the eponymous river), in which Yoshihisa employed a series of feigned retreats, breaking the Otomo Army (which still enjoyed a numerical advantage) down, and eventually winning a victory that was so comprehensive the Otomo effectively ceased to be serious rivals.

    The war wouldn’t end at Mimikawa, however, and in 1580, Oda Nobunaga began negotiations between the Otomo and Shimazu, hoping to bring an end to the war, since he wanted the Otomo to join his upcoming campaign against the Mori. The negotiations were apparently successful, as Yoshihisa even went so far as to recognise Nobunaga as his ‘lord’, and planned to join the attack on the Mori as well.

    The situation on the eve of Nobunaga’s death in 1582. The Shimazu lands are blue, in southern Kyushu.
    By Alvin Lee – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=39198356

    As we already know, Nobunaga’s death at the Honnoji incident in June 1582 put an end to those plans, but the weakened state of the Otomo and the fact that the peace deal no longer applied meant that the Shimazu were able to defeat or force the defection of several former Otomo retainers, increasing their own power and control over southern Kyushu.

    The campaign to unify the entire island would go on, but we’ll look at that next time.

    Sources
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E7%BE%A9%E4%B9%85
    https://ja.wikipedia.org/wiki/%E8%80%B3%E5%B7%9D%E3%81%AE%E6%88%A6%E3%81%84
    https://ja.wikipedia.org/wiki/%E5%A4%A7%E5%8F%8B%E6%B0%8F
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E7%BE%A9%E5%BC%98
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E8%B2%B4%E4%B9%85
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E5%BF%A0%E8%89%AF
    https://ja.wikipedia.org/wiki/%E6%A2%85%E7%AA%93%E5%A4%AB%E4%BA%BA
    https://ja.wikipedia.org/wiki/%E8%96%A9%E6%91%A9%E5%9B%BD
    https://en.wikipedia.org/wiki/Shimazu_Takahisa
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E5%BF%A0%E4%B9%85
    https://ja.wikipedia.org/wiki/%E5%B3%B6%E6%B4%A5%E6%B0%8F
    https://en.wikipedia.org/wiki/List_of_daimy%C5%8Ds_from_the_Sengoku_period

  • Kamakura IV – You can’t invade Japan…

    “…unless you’re the Mongols…” – John Green, Crash Course World History

    By the 1260s, the Mongol Empire was the most powerful state the world had ever seen. Throughout the 13th century, united under their leader, Genghis Khan and his heirs, the Mongols had conquered everything from China to Poland, sweeping aside any who opposed them, and spreading Mongol law and customs across Asia and into Eastern Europe.

    In 1260, Kublai was elected as Great Khan. The grandson of Genghis, he had established the base at Khanbaliq, in modern Beijing, would go on to declare himself Emperor of China in 1271 (establishing the Yuan Dynasty), and took part in the subjugation of Korea, which had only finally submitted (and even then, as only a vassal) in 1259.

    Kublai Khan, Great Khan, Emperor of China, and would-be conqueror of Japan.

    Though China would not be completely subjugated until 1279, the Mongol position in Asia was strong enough that Kublai could turn his eyes elsewhere in search of new conquests. Japan presented a unique challenge; though Mongol armies were dominant on land, they had relatively little power at sea, and Japan, as an island nation, presented an opportunity to enhance Mongol prestige, but came with considerable risk.

    At first, Kublai tried to get the Japanese to submit without a fight. In 1266, he sent an embassy with a letter inviting the Japanese to send tribute. The embassy was turned away without even delivering its letter. Kublai, apparently not believing that a Mongol embassy would be treated so disrespectfully, sent another mission which met with similar stonewalling.

    In 1269, Kublai sent a third mission, this time to the island of Tsushima, demanding to know why there had been no response to his earlier letters. At this point, the Imperial court in Kyoto got nervous and suggested that it might be better to deal with the Mongols diplomatically. However, the Hojo Regents in Kamakura rejected this approach; a letter was apparently drafted, but evidently never sent.

    The Mongol Cometh.

    Several more attempts at diplomacy were made, but all came to nothing. The Shogunate seems to have taken the threat of invasion seriously as early as 1268, though, and began preparing defences. In China, the first serious preparations weren’t made until 1274, when Kublai and the Mongols(more correctly, the Yuan Dynasty at this point) began the mobilisation of troops, ships and supplies.

    The first invasion force made landfall on the island of Tsushima in November 1274, but it’s not entirely clear how big the opposing forces were. As is common with these things, the numbers vary wildly, with Chinese sources saying the Japanese have over 100,000 warriors, whilst the Japanese claim to have been outnumbered 10 to 1, both of which are clearly exaggerations.

    Most scholars put the total Mongol forces at around 30,000 (including sailors), but what is certain is that they quickly conquered Tsushima and nearby Iki Island, using them as a base for stage two of their plan. Mongol forces (around 6000) landed at Hakata Bay, in modern Fukuoka, on November 19th.

    Here we see the mismatch in fighting styles between the Mongols and Japanese. The Japanese tried to fight in their own way, with individuals announcing themselves and seeking challengers from the opposing side until one side overcame the other. The Mongols, however, fought as units, not individuals, and they made use of early gunpowder weapons, like primitive hand grenades, which terrified the Japanese and their horses and disrupted their tactics.

    “According to our manner of fighting, we must first call out by name someone from the enemy ranks, and then attack in single combat. But they (the Mongols) took no notice at all of such conventions; they rushed forward all together in a mass, grappling with any individuals they could catch and killing them.” – Hachiman Gudokan

    The Japanese fought bravely, but were outmatched by Mongolian tactics and gunpowder weapons.

    The fighting was brief and badly organised, and though the Mongols were able to drive the Japanese back and even burn Hakata, they made no further progress. Overnight, apparently fearing a Japanese counterattack, the Mongols retreated to their ships, and by the next morning, they were gone.

    Japanese sources say that unfavourable winds blew the Mongol fleet back out to sea, whilst Chinese sources make reference to a storm that scattered the fleet either in Hakata Bay or when it was on its way back to Korea.

    Either way, the first Mongol invasion was over. There are no reliable accounts of Japanese losses, though they appear to have been heavy, especially on Tsushima, where the Mongols killed and burned everything before them. As for the Mongols, they may have lost up to half their forces, though again, the sources aren’t entirely clear.

    Scholars disagree about whether this first ‘invasion’ was an actual attempt to conquer territory in Japan, or was instead a reconnaissance in force, designed to test the fighting abilities of the Japanese before a major effort was launched.

    The Empire Strikes Back

    The Japanese at the time certainly believed that the Mongols would be back, and as soon as the last invader disappeared, preparations were made for their return. Potential landing sites in Kyushu were fortified with castles, and stakes were driven into river beds, and at Hakata, a 2-meter wall, the Genko Borui, was built to prevent a second sacking of the city.

    For his part, Kublai made another attempt at diplomacy and dispatched another embassy, which had orders to refuse to leave until an answer was received. They certainly got an answer when the regent of the day, Hojo Tokimune, had them beheaded. Their graves can still be seen at Joryu-ji Temple in Fujisawa.

    The stele marking the graves of the envoys, in Fujisawa.
    By kamakura – Self-photographed, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3082856

    Another embassy was sent in July 1279 and met the same fate, this time at Hakata, and in 1280, Kublai gathered his men, and together they made plans for a second invasion of Japan.

    By this time, China had been fully conquered, and using his newly acquired resources, Kublai was able to amass more than 1500 ships, and 100,000 men, with a further 40,000 in Korea. These numbers are probably exaggerated, but it does go some way towards showing how large the invasion was when compared to the first.

    The Mongol forces were divided into two: the Eastern and the Southern Army. The Eastern Army landed on Tsushima again in June, and once again, the island and nearby Iki Island were quickly conquered. The Eastern Army was supposed to wait for the Southern Army, but its commanders instead attacked Kyushu directly, landing at Hakata and nearby Nagato Province (in modern Yamaguchi Prefecture).

    The attack in Nagato was a failure, and the one at Hakata ran into the wall that had been built for that purpose. The Japanese had learned their lesson; they no longer sought out individual battles with the Mongols, instead remaining behind their defences and driving the invaders back with their bows (the preferred weapon of the Samurai at the time).

    The Mongols landed, but couldn’t overcome determined Japanese defenders, who had learned their lesson.

    Though driven back, the Mongols busied themselves with occupying the abundant islands around northern Kyushu, turning some of them into bases from which they raided the mainland. The Japanese lacked the naval strength to face the Mongol fleet directly, and instead launched night attacks on Mongol ships, inflicting minor damage and proving to be a nuisance rather than a serious strategic threat.

    The situation got worse for the Japanese when the Mongol Southern Fleet finally arrived, and the combined fleets based themselves at Takashima Island, where they made plans to renew the attack on Kyushu.

    At the same time, an army of some 60,000, dispatched by the Shogun to oppose the invasion, was making its way towards Kyushu, but before it reached Chofu, where it intended to cross from Honshu (Japan’s main island) to Kyushu, the weather had intervened.

    And they were scattered.

    In mid-August, the weather took a sudden turn, experienced sailors amongst the Mongol Fleet recognised the signs sought cover in Imari Bay, but it was already too late. On August 15th, a typhoon smashed into the Mongol Fleet, devastating it; those ships not sunk outright were stranded ashore where the Japanese made short work of their crews.

    The few Mongol ships that managed to survive the storm limped back across the sea to Korea, with some Chinese sources claiming that the losses may have been as high as 90%. The Mongol Invasion of Japan had failed, and though there were discussions about mounting a third attempt, they came to nothing, and Japan would remain free of foreign occupation until 1945.

    Despite having seen off the invasion, the Shogunate and the Hojo Regents were in no position to celebrate. Traditionally, warriors, victorious in war, were granted land taken from their defeated enemies, or at least could expect a share of the loot.

    The problem was that there was no land, and precious little loot to be shared out, and this led to growing resentment amongst the men who had actually done the fighting and dying and the popularity and prestige of the Shogunate was badly shaken.

    Another consequence of the failed invasion was a sharp rise in Japanese amongst the Wako, pirates who were a serious problem for coastal Chinese communities for decades afterwards, so much so, that Wako raids were cited as one of the reasons for an eventual Chinese ban on trade with Japan, though that would come long after the Mongol Yuan Dynasty had fallen.

    In Japan, too, the unsuccessful invasion led to some significant changes. Firstly, the belief that Japan was a land with divine protection became widespread, with the Kamikaze (literally, Divine Wind) being cited as the source of the Typhoon that had smashed the Mongol Fleet.

    Military technology was changed too; prior to the invasion, the Samurai had favoured the bow or spear as their primary weapon. When forced to fight up close with the Mongols, their swords were found to be too easily bent or broken, and this led to innovations in sword manufacturing that produced shorter, lighter, but stronger blades, giving birth to the iconic swords we know today.

    The Hojo and their puppet Shoguns would continue to rule Japan for decades after the threat of invasion had passed, but their rule was shaky, and the 14th century would see them face their final challenge, one of their own.

    Sources
    https://ja.wikipedia.org/wiki/%E5%85%83%E5%AF%87
    https://en.wikipedia.org/wiki/Mongol_invasions_of_Japan
    https://en.wikipedia.org/wiki/Kublai_Khan

    Not that many this week, eh?