"Nihon Seiki" (16 volumes) that corresponds to "3 volumes of ki" is a history book focusing on the emperors, which was proof-read and published by Sanyo's pupil, Wasuke ISHIKAWA, after Sanyo's death.
天皇中心の歴史書『日本政記』（全十六巻）は「三紀」に相当し、死後に門人の石川和介が山陽の遺稿を校正して世に出した。