When asked why he fights for Tsushima Island, Jinzaburou simply answers that there is something worth fighting for. The full force of the Mongol army assaults the main South Gate of the fortress defended by Nagamine and the Toibarai. The Mongols have only until sundown to win the battle before they must set sail for the invasion of the Japanese mainland. Nagamine sends Jinzaburou to reinforce the east wall where Teruhi and a small group are under attack. Soon, the Mongols breach the South Gate and kill Tatsu and Nagamine and the rest of the defenders. With the walls breached, Jinzaburou advises the survivors to retreat and surrender the fortress. He is joined by a small group of Tsushima soldiers and Onitakemaru who returned to the island. The defenders fight a rearguard action, with Dōen and Hitari losing their lives, but allowing at least Teruhi and some others to retreat to the ocean cliffs. However, an explosive fired by the Mongols sends Jinzaburou falling into the water far below.