He was also involved in the compilation of the "Konin" kyakushiki code (amendments to penal and administrative law compiled in 820) with FUJIWARA no Fuyutsugu and AKISHINO no Yasuhito under Emperor Saga.
嵯峨天皇の元において、藤原冬嗣・秋篠安人らと「弘仁格式」の編纂にも関わっている。