Ōtomo Sadachika

Ōtomo Sadachika (1246–1311) was the fifth head of the Ōtomo clan of Bungo, most likely the second son of Yoriyasu. When Chikatoki died in 1295, he succeeded to the headship on the retired elder's order.

The character sada in his name was presumably granted by Hōjō Regent Sadatoki, who in 1305 ordered him to establish Manju-ji temple in Bungo; he founded it in 1306. He died in 1311 aged sixty-six, and his younger brother Sadamune succeeded him.