Ōtomo Sadayori

Ōtomo Sadayori was a warrior of the late Kamakura and Nanbokuchō eras, the illegitimate eldest son of Ōtomo Sadamune, sixth head of the Bungo Ōtomo. Excluded from the succession when Sadamune made his younger brother Ujiyasu heir in 1333, he broke from the main house after their father's death in 1334. In 1336 he fought on the Southern Court side against Ashikaga Takauji at Tatarahama.

Reconciled with Ujiyasu, he rejoined the Northern Court in 1345 and received pardon and confirmation of his lands, but later rebelled again and took his own life under Northern Court attack.