An episode in which Michimori dies in the Battle of Ichinotani and his wife Kozaisho drowned herself following her husband became a symbolic tragedy of the Battle of Ichnotani and covered an entire chapter of the classical war chronicle, "The Tale of the Heike."
一ノ谷の戦いでの平通盛の死とその妻小宰相が後を追って入水したエピソードは、古典軍記物語『平家物語』で一章が割かれ、一ノ谷の戦いでの象徴的な悲話になっている。