During summer vacation, Nobita, Shizuka, Gian, and Suneo decide to go on a seabed camping trip at Doraemon's suggestion. While enjoying the deep sea world with the secret gadgets "Water Buggy" and "Thermo-Regulator," the five friends discover a sunken ship and meet a mysterious young man named El. He is a "Sea Person" living in the underwater kingdom of Mu. Distrustful of surface dwellers, the Sea People cannot trust Nobita and his friends. Meanwhile, news arrives that the dreaded "Oni-Iwajiro" has become active. What exactly is this "Oni-Iwajiro" that the Sea People fear? With the spirit of believing in their friends, they embark on a grand adventure for the fate of the Earth!

This remake of the 1983 film "Doraemon: The Record of Nobita's Deep Sea Adventure," the fourth film in the series, 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 & Water Buggy"!