Upon command of Emperor Kanmu did Yasuhito edit the "Shoku Nihongi" (Chronicle of Japan Continued), thereby being appointed Sangi (Councilor) in 805, but he fell from power once on the grounds that he was involved in an incident of Imperial Prince Iyo.
桓武天皇より命を受け『続日本紀』の編纂に携わり、805年に参議となるが、伊予親王の事件に関与したとされて一旦は失脚する。