Doraemon: Nobita no Kaitei Kiganjou

Nobita and his friends spend their summer vacation underwater in the Pacific Ocean. Jaian and Suneo use Doraemon’s underwater vehicle to search for a treasure ship in the Atlantic. Their journey is complicated when Doraemon’s environment gun loses power, putting them at risk from the ocean. They are saved by marine creatures who later capture Doraemon and his friends, revealing themselves as inhabitants of the underwater kingdom of Mu. Another kingdom, Atlantis, now controlled by robots, nearly destroys Earth with nuclear weapons after misinterpreting a volcanic eruption as an invasion. Nobita and his friends, with help from a boy from Mu, try to stop the robots but are captured. Doraemon’s underwater vehicle sacrifices itself to destroy the controlling computer, halting the attack. Doraemon and his friends are celebrated as heroes in Mu.