He was the first Prince of Emperor Sakuramachi, his birth mother was Gon Dainagon (Chief councilor of state), Sanetake Anegakoji's daughter, FUJIWARA no Sadako (Kaimeimon in) of Sakuramachi Naishi no suke.
桜町天皇の第一皇子で、生母は権大納言姉小路実武の娘で桜町典侍の藤原定子（開明門院）。