Koutetsujou no Kabaneri Movie 3: Unato Kessen  

甲鉄城のカバネリ～海門決戦～, Koutetsujou no Kabaneri Movie: Unato Kessen, Kabaneri of the Iron Fortress Movie: The Battle of Unato, 甲鉄城のカバネリ 〜海門決戦〜, Kabaneri de la Fortaleza de Hierro: La Batalla de Unato, Kabaneri da Fortaleza de Ferro: A Batalha de Unato, حماة الحصون المنيعة: معركة الحصن المهجور

The film is a follow-up to the series' narrative, set six months after its conclusion. In this sequel, the original cast reunites with an alliance to reclaim the lands surrounding Unato Castle. Despite their best efforts, things do not go as smoothly as anticipated. Will Ikoma and his companions manage to endure or will they succumb to the relentless Kabane?