In 1181, Kagesue was recognized for his Kyusen (Bow and arrow) expertise and appointed a member of Yoritomo's bedchamber guards along with children of important senior vassals including Yoshitoki HOJO, Yoshimochi WADA, Kiyoshige KASAI, and Yoshitsura MIURA.
治承5年（1181年）景季は弓箭に達する者として、北条義時、和田義茂、葛西清重、三浦義連ら有力御家人の子弟とともに頼朝の寝所を警護する武士に任じられる。