Ōsaki Tadamochi

Ōsaki Tadamochi (1327–1383) was a Nanboku-chō warrior, the first head of the Ōsaki clan and eldest son of Shiba Iekane. In 1352, as his father's Wakasa deputy, he led Wakasa troops to aid Ashikaga Yoshiakira in Kyoto. When Iekane became Ōshū kanrei in 1354, Tadamochi followed him into Mutsu and succeeded to the post in 1356.

Around 1366 he took the surname Ōsaki, after an ancestral estate in Shimōsa. In 1367 he joined Shogun Yoshiakira's campaign against the rebel Kira Haruie. He died in 1383.