However, such materials are not completely reliable, since the sources on which Iori used aren't confirmed and how deeply he knew Musashi is doubtful as well, besides, some information by Iori are considered to be in error, because they are completely deferent from information available in other materials.
しかし、原史料が不明であり、伊織が武蔵のことをどこまで知っていたかを問題視する意見もあり、他史料との比較から明らかな事実誤認も認められる。