Shōni Sadatsune

Shōni Sadatsune (1272–1336) was a commander of the late Kamakura and Nanboku-chō eras and the fifth head of the Shōni clan. In 1333 he helped the Chinzei tandai defeat Kikuchi Taketoki's revolt, then defected to Ashikaga Takauji after the Rokuhara tandai fell, forcing the Chinzei tandai to kill himself.

He joined Takauji's revolt in 1335; in 1336, with his son Yorihisa away leading the main army, he was attacked by Kikuchi Taketoshi at Uchiyama Castle and took his own life.