However after his nephew, Emperor Shirakawa succeeded to the throne, there was conflict starting to build up between husband, Toshifusa, who took advantage of 'Emperor Gosanjo's will' and strongly recommend Emperor Shirakawa's half younger brother, Imperial Prince Sanehito (Heian period) and Imperial Prince Sukehito to become Crown Prince, and Emperor Shirakawa who wish to let his grandchild to succeed to the throne.
しかし、甥の白河天皇が即位すると、「後三条天皇の遺言」を盾に白河天皇の異母弟・実仁親王(平安時代)、輔仁親王を東宮に推す夫・俊房と、自分の子孫を天皇に据えたい白河天皇は次第に対立するようになる。