He was engaged in the compilation of books, including "Konin Kyakushiki" (compilation of rules, regulations, and precedents), "Nihonkoki" (Later Chronicle of Japan) and "Dairishiki" (Ceremonial Book of the Court), and he was active in diverse fields, including the literary and military arts.
また『弘仁格式』『日本後紀』『内裏式』などの編纂にも従事し、文武を兼ね備えた多方面で活躍した。