While Gou prays for Hidetada's safe return from the war, Ieyasu, who learned of Mitsunari's move, halts his attack on the Uesugi family and moves his whole army eastward. On the way, Hidetada launches an attack against Sanada Yukimura, however experiences a hard battle. In Otsu, Takatsugu leaves the forces led by Mitsunari, being caught between the Toyotomi family and the Tokugawa family. Together with his wife, Hatsu, Takatsugu takes refuge in a castle and manages to survive Mitsunari's attack. On September 15, 1600, the battle between Ieyasu and Mitsunari finally breaks out in Sekigahara, but Hidetada has yet to reach the battlefield.
江戸で江（上野樹里）が秀忠（向井理）の無事の帰還を願うなか、三成（萩原聖人）の挙兵を受けて家康（北大路欣也）は上杉攻めを中止し、全軍を西へ向ける。秀忠は途中、上田城の真田幸村（浜田学）を攻め、苦戦を強いられる。大津では両軍の板挟みにあった高次（斎藤工）が西軍を離脱。妻・初（水川あさみ）と共に籠城し、西軍の攻めをしのいだ。関ヶ原で決戦の火ぶたが切られる時、秀忠はまだ戦場にたどり着けずにいた。
