Sakai Tadakatsu

Sakai Tadakatsu (酒井 忠勝^?, July 21, 1587 – August 25, 1662), also known as Sanuki-no-kami and Minamoto-no Tada katsou, was tairō, rōjū, master of Wakasa-Obama castle (若狭国小浜城) and daimyo of Obama Domain in Wakasa Province in the mid-17th century. As tairō, he was one of the two highest ranking bakufu officials in Tokugawa Japan from his elevation on November 7, 1638, through May 26, 1656.

The Sakai were identified as one of the fudai or insider daimyō clans which were hereditary vassals or allies of the Tokugawa clan, in contrast with the tozama or outsider clans.

Tadakatsu was part of a cadet branch of the Sakai which had been created in 1590.

The fudai Sakai clan originated in 14th century Mikawa Province. The Sakai claim descent from Minamoto Arichika. Arichika had two sons: one of them, Yasuchika, took the name Matsudaira; and the other son, Chikauji, took the name Sakai—and this samurai ancestor is the progenitor of this clan's name.

Sakai Hirochika, who was the son of Chikauji, had two sons, and their descendants gave rise to the two main branches of the Sakai clan. Hirochika's younger son, Sakai Masachika, served several Tokugawa clan leaders -- Nobutada, Kiyoyasu and Hirotada; and in 1561, Masachika was made master of Nishio Castle in Mikawa.

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