Rise of Tokugawa Ieyasu – Chris Perry, Author

If the bird will not sing, wait for it to sing.

The third, and ultimately, final unifier was born Matsudaira Takechiyo in December 1542. His father, Matsudaira Hirotada, is a somewhat mysterious figure, with several theories about the events of his life, and even his death, but what is known with (relative) certainty is that the Matsudaira Clan were the lords of Okazaki Castle in Mikawa Province, which is where Takechiyo (from now on, referred to as Ieyasu) was born.

At the time of his birth, the Matsudaira Clan were a relatively minor family in the service of the more powerful Imagawa. This was an era of constant civil war, and plots, subterfuge, and outright betrayal were common. To pre-empt this, in 1547, when Ieyasu was about five, he was sent to the Imagawa capital at Sunpu (in modern Shizuoka) as a hostage to secure his father’s loyalty.

A modern reconstruction of Sunpu Castle.
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The boy’s escort was entrusted to one Toda Yasumitsu, who promptly betrayed the Imagawa and instead had Ieyasu sent to Oda Nobuhide. Quite why Yastumitsu did this is debated, with some sources saying he sold Ieyasu for 1000 gold pieces (some say 100), and that the Imagawa promptly attacked his castle, and destroyed his family (though other sources say the Toda held out for a year or more).

Other sources say that the whole thing was actually a ruse arranged by Ieyasu’s father, who had secretly agreed to swear fealty to the Oda and had sent his son as a hostage as proof. It is also suggested that this was the first time Ieyasu met Oda Nobunaga, though historians debate whether the meeting actually took place.

Oda Nobunaga, who may (or may not) have met Ieyasu during his time as a hostage.

Despite the somewhat murky circumstances, Ieyasu’s time as a hostage would not last long, as his father soon passed away (the exact date and circumstances are debated), aged around 23-24, and the Lord of the Imagawa, Yoshimoto, arranged a hostage swap that saw Ieyasu brought to Sunpu, where, despite now being the nominal lord of Okazaki, the Imagawa meant to keep a close eye on him.

This is another page in Ieyasu’s history that the sources disagree on. Some suggest he was still a hostage, whilst others point out that, as the Lord of Okazaki, he was a direct vassal of the Imagawa, and instead, his residence in Sunpu was part of a wider policy of keeping vassals in a central location. Either way, Ieyasu was hardly kept in the dungeons, and in 1557, he married Yoshimoto’s niece, Lady Tsukiyama. (Tsukiyama is a place near Sunpu; her real name is not recorded.)

Lady Tsukiyama, Ieyasu’s first wife. Her real name may have been Sena, but that name doesn’t appear in the records until 1740, 160 years after her death.

A marriage to a close relative of Yoshimoto boosted Ieyasu’s standing within the clan, but it may also have played a part in the Imagawa’s own ambitions. For decades, the Kira Clan, descendants of the Ashikaga Shoguns, had held a preeminient position in Mikawa Province. Though not officially governors (shugo) of the Province, their illustrious descent meant that, at least in terms of lineage, they were equals to the Imagawa.

As we have seen dozens of times before, however, during the Sengoku Jidai, the prestige of an illustrious name wasn’t what it had once been, and the real power in Mikawa lay with the Matsudaira. By binding Ieyasu more closely to his family, Imagawa Yoshimoto sought to use this power to assert Imagawa control over the Province at the expense of the Kira and the other Mikawa Clans.

Mikawa Province.
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These ‘other clans’ weren’t all that happy to see the Imagawa take over, however. Much like the rest of the realm, the minor lords of Mikawa were an independent-minded bunch and were more content to rule themselves. An initial outbreak of rebellion was crushed in 1557, only to begin again a year later. This time, Yoshimoto dispatched Ieyasu to play a part in putting the rebellion down, and he got his first taste of battle at the Siege of Terabe Castle in March 1558.

Ieyasu earned praise from Yoshimoto and some of his vassals for his diligent approach to warfare. Later records suggest that he recognised that simply taking Terabe Castle wouldn’t be enough to fully subdue the rebels, so he set about burning the castle town and then several other settlements nearby. This may not sound like praiseworthy behaviour to you and me, but Yoshimoto was so impressed he rewarded Ieyasu with land and a shortsword.

With the rebellion in Mikawa crushed (for now), Ieyasu turned to securing his position as future lord of Okazaki and eventual master of the whole Province. The problem was that Ieyasu was still largely a stranger to the Mikawa Clans. He had been absent from the Province for most of his young life, first a hostage of the Oda, and later residing in the Imagawa Capital at Sunpu.

To resolve this, Ieyasu issued a seven-point decree outlining his relationship with his vassals. This decree was significant because it made it clear that, should Ieyasu’s vassals feel that he is ruling badly or ignoring their advice, they could appeal to Ieyasu’s father-in-law, Sekiguchi Ujizumi, who remained a powerful figure within the Imagawa Clan hierarchy, suggesting that, at least as late as 1559, Ieyasu intended to remain loyal to the Imagawa.

A later depiction of a battle in Mikawa Province. Like many minor clans at the time, the warriors of Mikawa were a fiercely independent bunch who would fight viciously to preserve that independence.

Since the time of Ieyasu’s Grandfather, the Matsudaira of Mikawa Province had been involved in a long-term conflict with the Oda Clan of neighbouring Owari. When the Mikawa and the Matsudaira came under the Imagawa banner, their new overlords inherited the conflict.

During the rebellion in 1556 and 1558, Oda had supported the anti-Imagawa forces, and Yoshimoto, weary of their interference, made the decision to crush them once and for all, which would have the added bonus of clearing his path to Kyoto. In preparation, Ieyasu was ordered to lead the vanguard and attack several border forts.

The site of Otaka Castle as it appeared in February 2014.
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He captured two forts and then lifted the siege of Otaka Castle, making it his temporary base. However, news arrived that Yoshimoto had been defeated and killed in a surprise attack at Okehazama. At that, Ieyasu retreated back to Okazaki to plan his next move. Historians debate whether Ieyasu intended to betray the Imagawa right away, or if the decision was a reaction to events, but in early 1561, he attacked Ushikubo Castle, an Imagawa stronghold in Mikawa, signalling his change of allegiance.

It is generally accepted that Ieyasu’s change of heart was brought about by the decision of the Imagawa’s new Lord, Ujizane, to prioritise fighting against the Takeda and Hojo, over the Oda, leaving Ieyasu to fend for himself against Oda Nobunaga, who was very much in the ascendancy after his surprising victory at Okehazama.

A 19th-Century depiction of the Battle of Okehazama, showing Imagawa Yoshimoto (the figure on the left) facing his demise.

The long standing animosity between Mikawa and Owari meant that neither side found it easy to stomach making peace, however, with Nobunaga facing serious issues against the Saito Clan to the north, and Ieyasu having to deal with the vengeful Imagawa, both sides swallowed their pride, and, in 1562, agreed to the so-called Kiyosu Alliance, bringing into existance one of Japanese history’s most important partnerships.

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The Third Unified – Tokugawa Ieyasu. Part One.