Nobita and Doraemon create an imaginary ocean above sea level using various gadgets, allowing them to swim together. However, when they turn off the illusion, a mermaid named Sophia appears in Nobita's backyard. She's the princess of an ancient underwater civilization. Doraemon and their friends become fast friends with Sophia and are invited to visit her homeland.
Doraemon The Movie: Nobita's Great Battle of the Mermaid King
A legendary sword holds the key to restoring peace to the oceans, and Doraemon, Nobita, and their friends join forces with Sophia to embark on a thrilling adventure to find it.
