Doraemon’s Undersea Adventure Remake Drops Epic Trailer: Nobita Faces Robotic Threat Poseidon in 2026 Film

The highly anticipated cinematic return to the deep sea is rapidly approaching. The official trailer for the upcoming anime feature, Eiga Doraemon: Shin Nobita no Kaitei Kiganjo, has finally been unveiled. Scheduled for release on February 27, 2026, this film serves as a modern reimagining of the beloved 1983 classic, Nobita and the Castle of the Undersea Devil. Fans can anticipate a thrilling blend of nostalgia and contemporary animation as Nobita, Doraemon, and their loyal companions plunge into an extraordinary subaquatic quest.

The new footage showcases the iconic group utilizing Doraemon’s impressive arsenal of futuristic gadgets essential for deep-sea survival and exploration. Key tools highlighted in the trailer include the necessary adaptation light and the charmingly sentient Underwater Buggy, which will facilitate their descent into uncharted territories. Their expedition quickly leads them to a monumental discovery: the clandestine underwater kingdom of Mu, where they cross paths with Eru, a spirited young inhabitant of the hidden civilization.

However, their journey of discovery quickly turns perilous. The peaceful environment is threatened by the formidable robotic force of Atlantis, commanded by the hyper-vigilant supercomputer, Poseidon.

Driven by a catastrophic misunderstanding—mistaking a natural volcanic eruption for an invading force—Poseidon escalates the conflict, issuing a chilling threat to deploy nuclear weapons against the surface world. This critical juncture sets the stage for high-stakes action, demanding immense bravery and unity from Nobita and his friends to prevent global catastrophe and secure peace both above and below the waves.

The production boasts a stellar creative team committed to revitalizing this classic narrative. Tetsuo Yajima, renowned for his directional work on major franchises including Pokémon the Movie: Secrets of the Jungle, steps in as director, promising dynamic visual storytelling. The script is penned by Isao Murayama, known for crafting engaging stories in series like Mahoutsukai Precure!. Further enriching the emotional landscape of the film is the theme song, “Honto,” delivered by the popular band sumika, adding a layer of heartfelt depth to the adventure. Produced by Shin-Ei Animation, and continuing the enduring legacy established by Fujiko F. Fujio’s original manga, Shin Nobita no Kaitei Kiganjo is poised to captivate a new generation while delighting longtime fans, reinforcing Doraemon’s status as a global cultural touchstone since its continuous television run began in 2005.