Kyōgoku Sadamune

Sasaki Sadamune (1287–1305), also called Kyōgoku Sadamune, was the third head of the Kyōgoku clan. A son of Sasaki Munetsuna, he received the character sada in his given name from the Kamakura regent Hōjō Sadatoki and succeeded his father in 1297.

He died in 1305 at the age of 19, killed in the Kagen disturbance while campaigning against Hōjō Munekata. He left only a daughter, so the headship passed through his cousin Muneuji to his adopted nephew Takauji, later Sasaki Dōyo.