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Daimyo of Hamamatsu, Matsudaira Tadayori was killed in an argument following a tea ceremony in Edo on this day, October 26, 1609Matsudaira Tadayori was a highly ranked vassal of the Tokugawa clan. During the Battle of Sekigahara in 1600, he was entrusted with the security of the Tokugawa and Matsudaira ancestral home, Okazaki Castle in Mikawa Province (modern-day Aichi Prefecture). Following the battle, he was assigned Inuyama Castle (Aichi Pref.) and Kaneyama Castle in Mino (Gifu Pref.) Tadayori’s wife was a daughter of the tea master warrior, Oda (Nagamasu) Yuraku, a younger brother of Oda Nobunaga. The couple had six children between them.Tadayori was on Sankin Kotai duty, the daimyo’s required alternative attendance of the Shogun’s court, when he was invited to a tea ceremony at the home of Mizuno Tadatane, a cousin of Tokugawa Ieyasu and the head of the Mikawa (Aichi Pref.) Mizuno clan of Kariya, on October 26, 1609. Other guests included the feudal police chief, the hatamoto ranked Kume Saheiji and Hattori Hanhachi.The full details of the incident can be found on my Substack subscription service. Search: Substack, Samurai History & Culture, Matsudaira Tadayori. The Deadly Tea Ceremony