The cause for the false charge claimed by KO no Moronao is rumored to be that Moronao had feelings for the wife of Takasada ENYA and made Kenko YOSHIDA write and send love letters to her but became angry in the face of rejection, but the truth remains unclear.
高師直の讒言の原因については、師直が塩冶高貞の妻に恋心を抱き、恋文を吉田兼好に書かせて彼女に送ったが拒絶され逆上したためとも言われているが、真相は不明である。