Set in World War II, the film depicts the story of the real-life Japanese battleship, the Yamato, which is confronted in the Pacific Ocean by giant monsters, including the most fearsome of them all, Reigo.

The movie revolves around Mitsuba, who studies traditional art of rakugo. Rakugo is a form of comical story telling, sometimes referred to as sit-down comedy. Even though Mitsuba is mediocre at best, he ends up teaching three students.

Minoru has spent most of his life being protected by his spunky female best friend Aki. Fed up, he decides to take up boxing. However, just as he manages to get stronger than Aki she becomes obsessed with boxing herself.