Since he was a person of great attainment, he was so confided by Emperor Seiwa and participated in editing "Jogankotaishiki" (the statute book when provincial governors change) and "Nihon Montoku Tenno Jitsuroku" (fifth of the six classical Japanese history texts).
その学識の高さをもって清和天皇の信任厚く、『貞観交替式』や『日本文徳天皇実録』の編纂作業に携わった。