Her father was the ruler of Izu Province and was given responsibility for MINAMOTO no Yoritomo, who had been exiled to Izu after being defeated in the Heiji Rebellion (Heiji no Ran).
伊豆の在庁官人であった父時政は、平治の乱で敗れ伊豆に流されていた源頼朝の監視役であった。