When Ichiman turned six in September 1203, Yoriie, who had been ill in bed, fell into critical condition, then the Conspiracy of Yoshikazu HIKI occurred due to the rivalry between the Hiki clan on Wakasa no Tsubone's side and the Hojo clan, Yoriie's maternal relative, over the succession to the position of family head.
一幡が6歳になった建仁3年（1203年）8月、病となった頼家が危篤状態に陥り、その家督相続を巡り若狭局の一族比企氏と、頼家の母方の外戚北条氏との対立による比企能員の変が起こる。