His father was of the Ichinomiya clan (a descendant of the Minamoto family) and a local clan in Echigo Province, and his mother was from the Suda clan (a descendant of the Fujiwara family) in Shinano Province.
父は越後国の土豪・一宮氏（源姓）、母は信濃国須田氏（藤姓）。