Nobita discovers evidence of strange disturbances affecting ocean creatures. Doraemon supplies underwater gadgets and the group—Nobita, Shizuka, Gian, Suneo, and occasionally supporting characters—travels below the waves to investigate. They encounter coral ecosystems, friendly and hostile sea creatures, and an antagonistic force exploiting the ocean for profit. The story builds through exploration, perilous set pieces, and teamwork, concluding with the kids using invention and courage to stop the threat and restore balance to the marine environment.
: Unlike many formulaic adventures, this story tackles the Cold War-era anxieties of its time (nuclear deterrence and underwater civilizations), which feel surprisingly relevant in the 2026 remake. Doraemon Underwater Adventure -1983- REMASTERED...