After Yoritomo's death, Yoritsuna accompanied the funeral ceremony of Sanman, Yoritomo's second daughter, who died young in July, 1199, and between October and November he participated in the impeachment of Kagetoki KAJIWARA along with other powerful gokenin.
頼朝の死後、頼綱は正治元年（1199年）6月に夭逝した頼朝の次女・三幡の葬儀に供奉し、その10月には他の有力御家人とともに梶原景時の弾劾に参加する。