was a Japanese samurai daimyō of the Edo period. He was head of a cadet branch of the Sakai clan.Papinot, Jacques Edmond Joseph. (1906). Dictionnaire d’histoire et de géographie du Japon; Papinot, (2003). "Sakai" at Nobiliare du Japon, p. 51; retrieved 2013-8-8.
Career In 1601, Tadatoshi was made head of Tanaka Domain (10,000 koku) in Suruga Province. His holdings were transferred in 1609 to Kawagoe Domain (30,000 koku) in Musashi Province.
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