However, the credibility of this book is problematic because it contains statements and documentation obviously inconsistent with historical facts; some of these inconsistencies follow: Keigannin, Kagekatsu's concubine, was a descendent of a prostitute; Kanetsugu NAOE forced this prostitute to disguise herself as a man and introduced her to Kagekatsu so that she would bear an heir to Kagekatsu; she bore Sadakatsu, but she incurred Kagekatsu's anger because he found out that she was a woman; this woman was disappointed by the loss of Kagekatsu's favor and killed herself; her suicide caused Sadakatsu to harbor ill will against Kanetsugu, and he killed Kanetsugu in person.
しかし、この書物には側室の桂岩院の出自を遊女とし、直江兼続が世継ぎを生ませる為、この遊女を男装させて景勝に引き合わせて定勝を生ませたが、この女は自分が女だと景勝に知られて怒りを買い、その寵愛を失ったことを悲観して自殺したとし、それを恨みとした定勝が兼続を自らの手で殺害するという明らかに史実と異なる記述や考証がされており、信憑性には問題がある。