Ōtomo Sadamune

Ōtomo Sadamune (c. 1265 – 9 January 1334) was the sixth head of the Ōtomo clan of Bungo. He succeeded his brother Sadachika in 1311 and served the Chinzei tandai Hōjō Hidetoki.

In March 1333 he refused to join Kikuchi Taketoki's rising and helped crush it. Two months later, after the Rokuhara headquarters fell, he switched sides and destroyed Hidetoki, earning the shugo post of Bungo. He died suddenly in Kyoto that December, leaving the headship to his son Ujiyasu.