In the view of topography, Seta-gawa River is the last line of defence in protecting the Omi no miya, and Prince Otomo (later becoming Emperor Kobun) led a crowd of his retainers and fought the battle.
瀬田川は地勢上近江宮を守る最後の防衛線であり、大友皇子（弘文天皇）自ら群臣を従えて出陣した。