In the article for FUJIWARA no Michitaka linage, daughter of FUJIWARA no Ienori in "Sonpi Bunmyaku," it is written 'nyobo (a court lady) for Bifukumonin, shosho no tsubone (the office of minor captain), mother of TAIRA no Chikamune.'
『尊卑分脈』の藤原道隆流・藤原家範女の項には「美福門院女房少将局平親宗母」とある。