Although the Genghis Khan theory, including the legend of Yoshitsune's migration to Ezo (Hokkaido) (Nyui Densetsu), was completely denied in academic circles of Meiji period and no scholar tried to take it seriously, it persisted beyond academic theories, and until the early Showa period, the book had been revised various times and was expanded.
こうしたジンギスカン説は明治の学界から入夷伝説を含めて徹底的に否定され、アカデミズムの世界でまともに取り上げられる事はなかったが、学説を越えた伝説として根強く残り、同書は昭和初期を通じて増刷が重ねられ、また増補が出版された。