"Keizu sanyo" was edited at the end of the Edo period and there is a possibility that some genealogists might have been edited if there was an inconsistency of the information, this record can not be treated as the base of history as far as the ordinary historian's research technique is concerned.
そのほか、同書は幕末期の編纂物であり単に矛盾に気づいた系図家などが手を加えた産物である可能性があるから、通常の歴史学の手法による限りこれを根拠とすることはできない。