Matsudaira Nobuyasu
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was the eldest son of Matsudaira Ieyasu. His ''tsūshō'' ("common name") was . He was called also , because he had become the lord of in 1570. Because he was a son of Tokugawa Ieyasu, he is often referred to, retroactively, as .


Biography

Nobuyasu was Ieyasu's first son. His mother was
Lady Tsukiyama Lady Tsukiyama or (d. 9 September 1579) was a Japanese noble lady and aristocrat from the Sengoku period. She was the chief consort of Tokugawa Ieyasu, the ''daimyō'' who would become the founder and first ''shōgun'' of the Tokugawa shogunat ...
, daughter of
Imagawa Yoshimoto was a pre-eminent ''daimyō'' (feudal lord) in the Sengoku period Japan. Based in Suruga Province, he was known as . he was one of the three ''daimyōs'' that dominated the Tōkaidō region. He died in 1560 while marching to Kyoto to become ...
. His childhood name was Takechiyo (竹千代). As a child Nobuyasu was sent to the
Imagawa was a Japanese samurai clan that claimed descent from the Seiwa Genji by way of the Kawachi Genji. It was a branch of the Minamoto clan by the Ashikaga clan. Origins Ashikaga Kuniuji, grandson of Ashikaga Yoshiuji, established himself in t ...
capital of Sunpu, located in
Suruga Province was an old province in the area that is today the central part of Shizuoka Prefecture. Suruga bordered on Izu, Kai, Sagami, Shinano, and Tōtōmi provinces; and was bordered by the Pacific Ocean through Suruga Bay to the south. Its abbrevia ...
(modern-day
Shizuoka Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Shizuoka Prefecture has a population of 3,637,998 and has a geographic area of . Shizuoka Prefecture borders Kanagawa Prefecture to the east, Yamanashi Prefecture to the northea ...
) as a hostage. Later he was named keeper of
Okazaki Castle is a Japanese castle located in Okazaki, Aichi Prefecture, Japan. At the end of the Edo period, Okazaki Castle was home to the Honda clan, ''daimyō'' of Okazaki Domain, but the castle is better known for its association with Tokugawa Ieyasu an ...
in
Mikawa Province was an old province in the area that today forms the eastern half of Aichi Prefecture. Nussbaum, Louis-Frédéric. (2005). "''Mikawa''" in . Its abbreviated form name was . Mikawa bordered on Owari, Mino, Shinano, and Tōtōmi Provinces. Mik ...
(modern-day
Aichi Prefecture is a prefecture of Japan located in the Chūbu region of Honshū. Aichi Prefecture has a population of 7,552,873 () and a geographic area of with a population density of . Aichi Prefecture borders Mie Prefecture to the west, Gifu Prefectur ...
), the birthplace of his father, and took part in the
Battle of Nagashino The took place in 1575 near Nagashino Castle on the plain of Shitaragahara in the Mikawa Province of Japan. Takeda Katsuyori attacked the castle when Okudaira Sadamasa rejoined the Tokugawa, and when his original plot with Oga Yashiro for taki ...
in 1575. It is generally believed that Nobuyasu's mother and his wife, the Lady
Tokuhime Tokuhime may refer to: * Tokuhime (Oda) (徳姫) (1559–1636), daughter of Oda Nobunaga; also known as Gotokuhime * Tokuhime (Tokugawa) (督姫) (1565–1615), daughter of Tokugawa Ieyasu * (登久姫) (1576–1607), daughter of Matsudaira ...
, daughter of
Oda Nobunaga was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period. He is regarded as the first "Great Unifier" of Japan. Nobunaga was head of the very powerful Oda clan, and launched a war against other ''daimyō'' to unify ...
, did not get along. It's possible that Lady Tsukiyama was jealous of the attention her son paid to his young wife. In 1579, whether out of a desire for revenge or to remove her mother-in-law's meddling in their marriage, Tokuhime wrote a letter to her father
Oda Nobunaga was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period. He is regarded as the first "Great Unifier" of Japan. Nobunaga was head of the very powerful Oda clan, and launched a war against other ''daimyō'' to unify ...
, accusing her mother-in-law of a treasonous plot with the
Takeda clan The was a Japanese samurai clan active from the late Heian period until the late 16th century. The clan was historically based in Kai Province in present-day Yamanashi Prefecture. The clan reached its greatest influence under the rule of Taked ...
. When Nobunaga brought the allegations to the attention of Ieyasu, he had his wife confined and then executed, to allay any suspicions of his ally. Nobuyasu was confined to Ohama and then Futamata Castle, where he received his father's order to commit suicide (''
seppuku , sometimes referred to as hara-kiri (, , a native Japanese kun reading), is a form of Japanese ritual suicide by disembowelment. It was originally reserved for samurai in their code of honour but was also practised by other Japanese people ...
''), in a letter which stated that Ieyasu understood that Nobuyasu may not have been guilty of any treasonous act, or even knew anything about it, but he understood that Nobuyasu would feel obligated to avenge his mother. The possibility of revenge was an unacceptable risk to Ieyasu, and the only solution was that Nobuyasu should kill himself for the integrity and security of the clan. Nobuyasu committed seppuku and killed himself on 5 October 1579, or the 15th day of the 9th month, of the year Tenshō-9, by the traditional Japanese calendar. Nobuyasu is not believed to have been a popular figure in his time, as his demise might attest. In particular, supposedly
Sakai Tadatsugu was one of the most favored and most successful military commanders serving Tokugawa Ieyasu in the late-Sengoku period. He is regarded as one of the Four Guardians of the Tokugawa (''Tokugawa-Shitennō''). along with Honda Tadakatsu, Ii Nao ...
declined to refute any suspicions of treason, due to his personal disregard for Nobuyasu.


Issue

* Toku-hime, who married Ogasawara Hidemasa of
Matsumoto Domain 250px, Matsumoto Castle, administrative headquarters of Matsumoto Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan. It is located in Shinano Province, Honshū. The domain was centered at Matsumoto Castle, located in ...
* Kumahime, who married
Honda Tadamasa was a Japanese ''daimyō'' of the early Edo period, who ruled the Kuwana Domain and then the Himeji Domain. He was the son of Honda Tadakatsu. Tadamasa's first battle was during the Siege of Odawara, in 1590; he also fought at the Battle of ...
* Banchiyo, who was the son of a concubine


References

*Griffis, William (1883). ''The Mikado's Empire,'' Book I. New York: Harper & Brothers, p. 272 1559 births 1579 deaths Tokugawa clan Suicides by seppuku Deified Japanese people {{Japan-noble-stub