However, since around the late Meiji period, a thorough investigation of the place where the old manuscripts were kept and their comparison were begun, and many old manuscripts of fine quality such as Oshima-bon were found, which made it possible to make a variorum edition of the Aobyoshi-bon manuscripts.
しかしながら明治末期ころから本格的な古写本の所在の調査とその比較が始まり、大島本など良質な本文を持つとされる古写本がいくつも発見されることにより青表紙本をもとに校本を作成することが可能になった。