While the Taira clan was in flight westward, many of Sukemori's brothers withdrew from the train along the way; however, as one of the members of the family who continued onward to the final destination, Sukemori along with his only remaining younger brother, Arimori, and his cousin, TAIRA no Yukimori, committed suicide by throwing themselves into the rapids of Dannoura.
平氏西走の道中、兄弟が次々と脱落していった中で最後まで一門として踏みとどまった資盛は、一人残った弟の有盛と従弟の平行盛とともに壇ノ浦の急流に身を投じて自害した。