However he moved to secure the position of Ukone no daisho before the official announcement of Yoritomo's death and, after completing the procedure to appoint MINAMOTO no Yoriie, who was the heir of Yoritomo (and expected to become the next shogun) to Sakone no chujo (Middle Captain of the Left Division of Inner Palace Guards) by recommendation of Ukone no daisho at the same time and while placing the court in mourning.
しかし、通親は頼朝死去の正式発表前に自分の右近衛大将就任を繰上で発動して、同時に右近衛大将の推薦という形式で（次期将軍になるであろう）頼朝の嫡男源頼家の左近衛中将任命の手続きを取ってから「頼朝死去」の喪を発するという離れ業を演じた。