At the Battle of Hoji, he destroyed the Miura clan (who were a powerful gokenin) and removed Yoritsugu FUJIWARA (the fifth shogun), who had gained support from the anti-Tokuso forces, from his position as sekke shogun; in 1252, he invited Imperial Prince Munetaka to become the sixth shogun (Munetaka held the title of miyashogun, which literally means "shogun from the Imperial Court," or kozoku shogun, which literally means "shogun from the Imperial family").
また宝治合戦で有力御家人の三浦氏を滅ぼし、摂家将軍で反得宗勢力の支持を集めていた5代将軍藤原頼嗣を廃立し、1252年、新たに宗尊親王を6代将軍に迎えた（宮将軍または皇族将軍）。