(Oe can mean a crown prince, but because there is no description that the Prince Yamashiro no oe became a crown prince in Nihonshoki [Chronicles of Japan], some people believe that he was simply a prince)
（大兄は皇太子の意味となれるが山背大兄王が皇太子となったという記述は日本書紀にはなく、単なる皇子とする者もいる）