With MINAMOTO no Yoshitomo for her father and Yura gozen, his lawful wife, for her mother, she was a sister of MINAMOTO no Yoritomo who established the Kamakura bakufu (Japanese feudal government headed by a shogun).
父は源義朝、母は正室の由良御前で、鎌倉幕府を開いた源頼朝の同母妹（または姉）である。