When MINAMOTO no Yoritomo raised his army in August 1180, Hideyoshi's sons joined Yoritomo's army, and Shigekuni was asked by Yoritomo to also join his army, but Shigekuni participated in the army of Kagechika OBA, who took sides with Taira clan, in the Battle of Ishibashiyama out of his moral debt to Ise-Heishi (Taira clan).
治承4年（1180年）8月の源頼朝挙兵では秀義の息子たちは頼朝に従い、重国は頼朝から加勢を打診されたが、伊勢平氏に対する旧恩から石橋山の戦いで平家方の大庭景親の軍に属した。