In contrast to China, where revision and enforcement were made to cover for the insufficiency of the Ritsuryo codes that were compiled simultaneously, Japan took the style of revising on a later day, all the laws and ordinances that were added in the forms of imperial edicts and Daijokanpu (official documents issued by Daijokan, Grand Council of State) after the compilation of the Ritsuryo codes.
中国では律令編纂と同時にその不足を補う意味で編纂・施行が行われたのに対して、日本では律令編纂後に詔勅・太政官符の形式で追加された法令を後日纏めて編纂する形が取られた。