His mother was Shomeimon-in MINAMOTO no Zaishi, an adopted daughter of Michichika KOGA. (MINAMOTO no Michichika) (In fact a daughter of a Hossho-ji Temple executive, the highest rank among Buddhist priests, Noen.)
母は、久我通親（源通親）の養女（実は法勝寺執行法印能円の女）承明門院・源在子。