Soon after the death of Yoritomo on October, 1199, when Tomomitsu was put into a difficult position by the so called 'Kagetoki KAJIWARA's False Claim Incident' (the Incident of Kagetoki KAJIWARA), he gathered 66 influential vassals including Yoshimura MIURA, writing down the 'Accusation Note against Kagetoki' with their joint signatures and submitted it to the second shogun MINAMOTO no Yoriie.
頼朝没後間もない正治元年（1199年）10月、いわゆる「梶原景時讒訴事件」（梶原景時の変）において窮地にたたされた朝光は、三浦義村ら有力御家人66人を結集して「景時糾弾訴状」を連名で作成し、二代将軍源頼家に提出。