Ogasawara Sadamune (小笠原貞宗, 1292–1347) was a Japanese nobleman and a major figure in the formation of the Ogasawara-ryū.
A close ally of Ashikaga Takauji, Ogasawara was placed in charge of court etiquette.[1] His approach to etiquette was influenced by Seisetsu Shōhō (Ch'ing-cho Cheng-ch'eng), with whom Ogasawara studied Zen Buddhism and Chinese literature.[2]
Having inherited the headmastership of his family's school of kyujutsu and yabusame, he was archery instructor to both Takauji and Emperor Go-Daigo. He stressed the importance of inuoumono (dog-shooting) in archery practice, even writing a treatise (the Inuoumono mokuanbumi) on the subject.[3][4] He also authored the Shinden kyūhō shūshinron, now regarded as a classic text on kyujutsu.[5]