Koutetsujou no Kabaneri Movie 3: Unato Kessen

Six months later, Ikoma, Mumei and their companions arrive aboard the armored train Kotetsujo in Unato, a region overrun by Kabane. The attacks there seem unusually coordinated and dangerous, and a group of survivors asks for their help in reclaiming their home.

The resulting alliance pushes toward the castle while investigating the strange behavior of its enemies. Yet the struggle for Unato conceals a deeper tragedy, forcing the travelers to confront the despair behind the battle as well as the creatures threatening their lives.