Kimiyori counterattacked at Kamachi-jo Castle against the army of FUJIWARA no Suminori, the younger brother of Sumimoto, who destroyed Dazai-fu and invaded Yanagawa during Rebellion of FUJIWARA no Sumitomo.
藤原純友の乱の時、大宰府を落として柳川に迫った純友の弟の藤原純乗の軍勢を、蒲池城で迎え撃った。