Play Last Stand Against Ieyasu. To obtain the Evil's Bane (Kamunaobi no Mitsurugi), thrash Masamune Date, Tadakatsu Honda, Hanzou Hattori, and Inahime. Trigger their appearance by approaching and escorting Kagekatsu Uesugi. Get Masamune Date first, then take out the other three before allies like Keiji Maeda and Yukimura Sanada get them. Then take a horse to catch the supply team that will show up from the gate north of the central plain and scurry northeast.