The rare books in Momokibunko have been collected in the National Taiwan University Collection. Among these books, there are two editions of Ritsu: one is an edition with annotations, and the other is an edition without annotations. The author has provided an overview to discuss Momokibunko and Nagasawabunko in the Japanese journal "Bulletin of the Society for Legal History NO.15" Based on the primary study, this article focuses on the edition of Ritsu with annotations in Momokibunko and puts more emphasis on its annotations.