After grown up, Mochiuji confronted the bakufu and the Kanto Kanrei (a shogunal deputy of the Kanto region) Uesugi clan (in the Kyotoku War), and Mochiuji was expelled from Kamakura during the war.
成長した成氏は、幕府や関東管領上杉氏と対立して（享徳の乱）鎌倉を追われた。