On the contrary, there is also a study which positively evaluates the establishment of Yoro Ritsuryo Code, which says it provided a more suitable and reliable code which adapted to the actual conditions of Japan, through the process of revisions and amendments of Taiho Ritsuryo Code that had been in force for a half century since its enactment (the theory released by Hiroaki HARUNA).
一方、大宝律令の施行から半世紀が経過して律令国家の定着していく中で、より日本の実情に合わせた律令制への再構築の一環として行われたとして積極的評価をする説（春名宏昭説）もある。