During summer vacation, Nobita, Shizuka, Gian, and Suneo decide to go on an underwater camping trip at Doraemon's suggestion. While enjoying the deep sea world using the secret gadgets "Aqua-Buggy" and "Sun-Light," the five friends encounter a mysterious young man named El after discovering a sunken ship. He is an "underwater person" living in the "Mu Federation" that spreads across the ocean floor. Distrustful of surface dwellers, the underwater people cannot trust Nobita and his friends. Amidst this, news arrives that the "Oni Rock Castle" has begun to activate. What exactly is this "Oni Rock Castle" that the underwater people fear? With the spirit of believing in their friends, they embark on a grand adventure for the fate of the Earth!

 

This film, a remake of the 4th movie in the series, "Doraemon the Movie: Nobita's Little Star Wars 2021," released in 1983, is the first in the series to be released in February and the first to be shown in 4D. After watching the movie, immerse yourself in the lingering emotions with figures of "Doraemon" and "Shizuka & Aqua-Buggy"!