She was the eldest daughter of FUJIWARA no Tadamichi, who had the title of Sessho (Regent), Kanpaku (chief adviser to the Emperor), and Daijo-daijin (Grand minister of state), and her mother was FUJIWARA no Muneko, who had the rank of Kita no Mandokoro (legal wife of regent or chief adviser to the Emperor) and Juichii (Junior First Rank) (daughter of FUJIWARA no Munemichi, who had the rank of Gon Dainagon (a provisional chief councilor of state))
摂政関白太政大臣藤原忠通の長女、母は北政所従一位藤原宗子（権大納言藤原宗通の娘）。