After Tomiko HINO, the wife of Shogun Yoshimasa, had a son (Yoshihisa ASHIKAGA), he not only plotted to out Yoshimi ASHIKAGA, Yoshimasa's younger brother, to whom Yoshimasa had promised that he would hand over the shogunate, but also interfered in the succession dispute in the Shiba clan, one of the three Kanrei (family in the post of shogunal deputy to the Muromachi Shogunate), but he fell from power along with Sadachika and others in the Bunsho Coup caused by the opposition such as Katsumoto HOSOKAWA in 1466.
義政夫人の日野富子に子（足利義尚）が誕生した後は義政が次期将軍と約束していた弟の足利義視を排斥しようとして策謀し、三管領の1つの斯波氏の家督問題にも介入し、1466年（文正1年）に対立する細川勝元らによる文正の政変で貞親らとともに失脚する。