After the death of Yoritomo, he participated in the council of 13 representatives of lower-ranking vassals, who were created out of concern of the autocratic nature of the second shogun MINAMOTO no Yoriie.
頼朝死後、2代将軍源頼家の独裁ぶりに不安を抱いた御家人の代表による十三人の合議制にも参加。