On August 2, 968, it was decided, by fortunetelling, that she would become Saigu of her elder brother, Emperor Reizei, thus entering Shosaiin (Hall of Initial Abstinence) (Konoefu - the Headquarters of the Inner Palace Guards) on January 20, 969.
安和元年（968年）7月1日に兄冷泉天皇の斎宮に卜定され、同年12月25日初斎院（近衛府）に入る。