Kuromukuro

A high school girl living near a United Nations research facility in rural Japan inadvertently awakens a samurai warrior who has been sealed inside an ancient mecha for centuries. Together they are drawn into a conflict against alien invaders whose motives are connected to an event from feudal Japan. As the girl and the displaced samurai struggle to understand one another across the gulf of centuries, they must fight alongside a multinational team to defend Earth from escalating extraterrestrial attacks.