When Nobita goes diving with Doraemon, a mermaid named Sophia comes close to him and they all befriend her. When they proceed towards her kingdom, they encounter a fight between two opposing tribes.
Wasabi Mizuta
Doraemon (voice)
Chiaki
Dorami (voice)
Megumi Oohara
Nobita (voice)
Tomokazu Seki
Suneo (voice)
Yumi Kakazu
Shizuka (voice)
Subaru Kimura
Gian (voice)
Shihoko Hagino
Dekisugi (voice)
Mayumi Izuka
Haribo (voice)
