In 866 when he was in charge of sangi (councillar), sadaiben (major controller of the left), and Kageyushi no kami (chief Investigator of the records of outgoing officials), the Otenmon incident occurred, and he, together with FUJIWARA no Yoshitada, interrogated TOMO no Yoshio.
参議・左大弁・勘解由長官の任にあった貞観8年（866年）に応天門の変が起こり、藤原良縄とともに伴善男の尋問に当たった。