However, Motoakira did not place great emphasis on the reliability of the sakushazuke, on which he based his work and as such, not only did he unquestioningly adopted sources containing numerous mistakes but it also appears as though he did not refer to fundamental sources such as "Sarugaku Dangi" an "Go On."
しかし元章は各作者付の信頼度については深く検討せず、結果として誤りの多い資料を無批判に採り入れる一方、逆に『申楽談儀』『五音』など根本資料と言える世阿弥の著書も見ていなかったらしい。