The official trailer for the upcoming 2026 Doraemon film, titled “Doraemon the Movie: Nobita and the New Castle of the Undersea Devil,” has been released, providing fans with a deeper look into Nobita and friends’ latest adventure, set to a new theme song by the band sumika. The film is slated to premiere in Japan on February 27, 2026.
Diving into the New Underwater Adventure
The 45th Doraemon feature film is a remake of the classic 1983 movie “Doraemon: Nobita and the Castle of the Undersea Devil.” The newly released trailer showcases the aquatic world that Doraemon, Nobita, Shizuka, Gian, and Suneo will explore, filled with both beauty and peril. The tagline for the film, “10,000 meters beneath the sea. There is still a world on Earth that no one knows,” hints at the mysterious depths the characters will delve into.
The trailer offers glimpses of dazzling coral palaces, shimmering schools of fish, and vast ruins that suggest an ancient civilization hidden beneath the waves. However, the adventure takes a dangerous turn as the friends encounter the menacing “Devil Castle” and mysterious creatures, uncovering an evil plot to attack the surface world.
sumika’s Theme Song Sets the Tone
While details about the specific title of sumika’s theme song were not immediately available in the search results, its inclusion marks a significant musical contribution to the beloved franchise. The band’s style is expected to complement the film’s themes of adventure, mystery, and friendship. Previous Doraemon films have featured popular artists, with theme songs often becoming iconic parts of the movie experience. For instance, the 2024 Doraemon film, “Nobita’s Earth Symphony,” featured Vaundy’s “Time Paradox” as its theme, and the 2025 film, “Nobita no Esekai Monogatari,” included Aimyon’s insert song.
Cast and Production Details
Tetsuo Yajima, known for his work on “Pokémon: Mega Evolution Specials I-IV,” is directing the film. The screenplay is penned by Isao Murayama, who has contributed to several episodes of the Doraemon series. The main voice cast for Doraemon, Nobita, Shizuka, Gian, and Suneo will reprise their roles. Additionally, two new characters, Eru (voiced by Shoya Chiba) and the Underwater Buggy (voiced by Ryo Hirohashi), have been introduced. Eru is described as a warrior from the underwater kingdom, while the Underwater Buggy serves as Doraemon’s secret gadget and an underwater vehicle.
The film is produced by Fujiko Pro, Shogakukan, TV Asahi, Shin-Ei Animation, and ADK. “Doraemon the Movie: Nobita and the New Castle of the Undersea Devil” promises to deliver an exciting blend of exploration, gadget-filled action, and heartwarming friendships as the characters race to prevent a catastrophe and save both the underwater and surface worlds.
