After that, research on ritsuryo became active between the end of the eighth century and the beginning of the ninth century, and many private commentaries such as Reishaku, Sekki, and Kekki, which are quoted in the "Ryo no shuge" (Commentaries on the Civil Statutes) were published around that time.
次いで律令の研究が興隆したのは8世紀末から9世紀はじめにかけての時期で、このとき『令集解（りようのしゆうげ）』が引用する令釈、跡記、穴記などの多くの私的注釈書が生まれている。