In 1600, the Sekigahara Campaign began. At this time, Masamune received reinforcements from Mogami Yoshiaki at Yoshihime's request. Katakura Kagetsuna advised Masamune to wait for the enemy army to be exhausted. The Uesugi clan attacked the Kaminoyama castle that was defended by the Mogami clan, Naoe Kanetsugu manages to take the castle and Mogami's army flees. Masamune sends reinforcements to the security of Yoshihime who was in the middle of the battle. In the Siege of Hasedō, Yoshiaki fights alongside Date clan to repel Uesugi from Yamagata. Tokugawa Ieyasu wins at the Battle of Sekigahara and Uesugi Retreat. After the war, Yoshihime sent a letter of thanks to Masamune.