The genealogy says that he fell from the horse and died, but the details such as the year of his death are unknown, and therefore, there is also an opinion about this that Masayuki was ruined by the Hisayuki group.
系図には「落馬」とあるが没年などの詳細は不明であり、これには尚之派によって没落させられたとする説も存在する。