Doraemon: Nobita and the Castle of the Undersea Devil

Name: Doraemon: Nobita and the Castle of the Undersea Devil
Director: Tsutomu Shibayama
Genre: Animation, Adventure, Family, Fantasy, Science Fiction
Released: 1983-03-12
Rating: 7.1
Cast: Nobuyo Oyama, Noriko Ohara, Michiko Nomura, Kaneta Kimotsuki, Kazuya Tatekabe

Original title: 映画ドラえもんのび太の海底鬼岩城

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Synopsis

Nobita and his friends under the waters of the Pacific Ocean. Gian and Suneo take Doraemon's underwater vehicle and travel through the Atlantic Ocean, trying to find a treasure ship. Along the way, they discover that the environment gun that Doraemon used to protect them is running out of energy leaving them vulnerable to the sea. Fortunately, they are rescued by some marine creatures.