Daimyo Matsudaira Tadayori, a distinguished vassal of the Tokugawa clan, was born in 1582, the same year Oda Nobunaga was assassinated, and met his demise in a dispute following a tea ceremony in Edo in 1609.
During the pivotal Battle of Sekigahara in 1600, Tadayori was entrusted with safeguarding the Tokugawa and Matsudaira ancestral home, Okazaki Castle in Mikawa (Aichi Prefecture). Post-battle, he was granted the command of Inuyama Castle (Aichi Pref.) and Kaneyama Castle in Mino (Gifu Pref.). Subsequently, his uncle, Matsudaira Iehiro, passed away, and Tadayori inherited his uncle's estates and a stipend of 15,000 koku at Musashi-Matsuyama (northern Tokyo, Saitama Pref.) later that year.
At the age of 20, Tokugawa Ieyasu doubled Tadayori's income in 1602, and he was reassigned to the strategically important Hamamatsu Castle with a stipend of 50,000 koku. Tadayori's wife hailed from the Oda clan (Nagamasu Yuraku), a younger sibling of Oda Nobunaga, and the couple had six children.
While fulfilling his duties in Sankin Kotai, the mandatory alternate attendance at the Shogun's court, Tadayori attended a tea ceremony at the residence of Mizuno Tadatane, a cousin of Tokugawa Ieyasu and the head of the Mizuno clan in Mikawa (Aichi Pref.), on October 26, 1609. Other notable attendees included the feudal police chief Hatamoto, Kume Saheiji, and Hattori Hanhachiro.
Following the tea ceremony, the gathering transitioned to sake drinking and a game of Japanese chess known as Go. Amidst a dispute over a winning move between Mizuno and Hattori, tempers escalated, leading to drawn swords. In the attempt to quell the altercation, Matsudaira Tadayori lost his life at the age of 27. His final resting place is at Seigan-ji Temple in Fuchu, western Tokyo.
Subsequently, both Hattori and Mizuno were ordered to commit seppuku over the incident, which occurred a month later.
See also
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Oda Nobutaka
Oda Nobutaka (1558–1583) was a samurai of the Oda clan, also known as Kanbe Nobutaka after being adopted as the head of the Kanbe clan, which governed the central region of Ise Province. He was the third son of Oda Nobunaga, born to a concubine named Sakashi. Nobutaka was referred to as "San Shichi," possibly because he was born on the seventh day of the third month in the Japanese lunar calendar. However, there is a theory suggesting he was born twenty days earlier than his elder brother, Oda Nobukatsu, but due to delays in reporting and the low status of his mother’s family, he was acknowledged as Nobunaga’s third son.
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Yamauchi Kazutoyo
Yamauchi Kazutoyo (also spelled Yamanouchi; 1545/1546? – November 1, 1605) was a prominent samurai and retainer who served Oda Nobunaga and later Toyotomi Hideyoshi during Japan's Sengoku and Azuchi-Momoyama periods. His father, Yamauchi Moritoyo, was a descendant of Fujiwara no Hidesato and a senior retainer of the Iwakura Oda clan, which opposed Oda Nobunaga. Moritoyo was also the lord of Kuroda Castle in Owari Province. Kazutoyo is especially renowned for his marriage to Yamauchi Chiyo, whose wisdom and resourcefulness played a key role in his rise to prominence.
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Saito Tatsuoki
Saito Tatsuoki (6 September 1548 - 1573) was a daimyo of Mino Province during Japan's Sengoku period and the third-generation lord of the Saito clan. He was the son of Saito Yoshitatsu and grandson of Saito Dosan. His mother was a daughter of Azai Hisamasa, making him a nephew of Azai Nagamasa and a relative of Oda Nobunaga's first wife, Nohime, who was also a daughter of Saito Dosan.
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Kyogoku Tadataka
Kyogoku Tadataka (1593–1637) was a Japanese nobleman and the head of the Kyogoku clan during the early 17th century, a pivotal time marked by the Tokugawa consolidation of power. His childhood name was Kumamaro, and he hailed from a lineage claiming descent from Emperor Uda (868–897). Tadataka was the son of Kyogoku Takatsugu and one of his concubines, with his paternal grandfather being Kyogoku Takayoshi.
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Matsudaira Naomasa
The late Muromachi period, also known as the Sengoku period, was an era of continuous conflict and upheaval, often likened to periods of chaos in Chinese history. This turbulent era was brought to an end by Tokugawa Ieyasu, who, with the support of loyal retainers, established the Edo Shogunate and became the ruler of Japan. Among Ieyasu’s descendants, Naomasa Matsudaira, his grandson, played a significant role during the Osaka Siege. He earned praise from his adversary, Nobushige Sanada (Yukimura Sanada), for his valor as a young warrior and maintained strong relations with successive Tokugawa shoguns.
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Ishikawa Kazumasa
Ishikawa Kazumasa (1534–1609) was a prominent Japanese retainer who began serving Tokugawa Ieyasu during his youth. Their relationship began in 1551 when both were hostages under the Imagawa clan. Kazumasa remained a loyal companion to Ieyasu, participating in key events such as the Siege of Terabe in 1558 and the Siege of Marune in 1560. After Ieyasu broke away from the Imagawa following the latter event, Kazumasa became a trusted retainer and administrator in his service.
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Shimazu Toyohisa
Shimazu Toyohisa (July 1570 – October 21, 1600), also known as Shimazu Tadatoyo, was a samurai of the Shimazu clan and the son of Shimazu Iehisa. He was the nephew of Shimazu Yoshihiro and held command over Sadowara Castle. Known for his valor, Toyohisa participated in numerous key battles of the late Sengoku period, earning recognition for his bravery and tactical acumen.
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Ikeda Terumasa
Ikeda Terumasa (January 31, 1565 – March 16, 1613) was a Japanese daimyo of the early Edo period, recognized by his court title, "Musashi no Kami," and known as the "Shogun of Western Japan." Terumasa, a distinguished military leader, participated in numerous significant battles during the late Azuchi-Momoyama period. His service at the Battle of Sekigahara earned him control over the Himeji domain. Originally named Araokojimaru, he was the son of Ikeda Tsuneoki and the brother of Ikeda Sen. He later became the heir to Ikeda Nobuteru and held Ikejiri Castle in Mino Province.
