"Heike Monogatari" describes Hideto as the strongest warrior in Kyushu, which includes a story that Hideto fought bravely in the naval battle of Dan no ura as the Daishogun (command in chief) of the Taira clan by leading warships.
『平家物語』では秀遠は九州第一の精兵とされ、壇ノ浦の戦いで平家方の大将軍として軍船を率いて奮戦した。