Natural father: MINAMOTO no Tadamune (Kawachi-Genji (Minamoto clan), a grandson of MINAMOTO no Yoshiie), an officer of Obu Village in Kazusa Province, called as Genta OBU.
実父：源忠宗（河内源氏・源義家の孫）上総国飯富庄司、飯富源太と称す。