If you have grown up watching Doraemon, you must find it oddly comforting and hilarious to see Nobita get into trouble again.
The familiar double-decker house, Doraemon’s gadgets, Shizuka’s patience, Gian’s bluster and Suneo’s complaints are all here in Doraemon: Castle Of The Undersea Devil. This 45th animated feature takes Nobita and his gang in another dimension: deep beneath the ocean.
And, this is exactly the appeal of the new Doraemon movie. It isn’t trying to reinvent the characters. Instead, it takes a 1983 story and gives it a visual scale that modern animation can offer.
The film was released in India on October 2, 2026, in theatres.
The Underwater World Is The Film’s Biggest Attraction
The story begins with a typical Nobita problem. He and his friends cannot agree on where to spend their vacations: the beach or mountains. Doraemon, as usual, has a gadget-based answer. With his gadget, they go under the sea to explore the huge mountain.
Their underwater trekking soon turns into something bigger when they encounter the mysterious Mu Federation and meet a young boy named EL. From there, the friends get caught up in a conflict to safeguard an ancient underground fortress.
Watching Nobita and his friends explore the underwater world is fun because the film takes its time showing them discover things they have never seen before. There are colourful sea creatures, futuristic gadgets and plenty of situations where Doraemon's inventions create as many problems as they solve.
But, The Story Starts Carrying Too Much
The film quickly introduces too many elements in one go. The Mu Federation, Atlantis, Bermuda Triangle, Poseidon and the larger threat surrounding the underwater castle keep adding mythology to an otherwise straightforward movie.
Although none of the ideas is inherently problematic, the story seems overstuffed and busier because of them.
This is a recurring issue with the film because Doraemon movies must be more about friendship and emotional depth at their core. The overload of information is difficult for the audience to absorb at times.
Nobita Is Still The Emotional Centre
Despite all the fantasy gadgets, extraordinary elements, and too much information, the movie ultimately works because of Nobita.
Nobita is not always the smartest and bravest among the five friends. He is often scared, makes mistakes and needs Doraemon’s help. But when it comes to his friends, he is willing to put himself at risk.
This is what holds the movie together and give its emotional depth.
The friendship between Nobita, Doraemon, Shizuka, Gian and Suneo therefore remains more interesting than the larger fantasy mythology surrounding them.
The story has another layer of giving an environmental message. The underwater civilisation is suspicious of humans because of the damage people have caused to the sea. That gives the film an environmental message without completely turning the story into a lecture.
Doraemon: Castle Of The Undersea Devil: Who Are the Voice Artists Of Hindi Language
Bhakti Jhaveri voices Nobita, Ayushi Prakash voices Doraemon, while Aniket Khadye, Sanchit Wartak and Parul Bhatnagar voice Gian, Suneo and Shizuka. Rohan Jadhav voices El. The performances preserve the familiar personalities rather than trying to make the characters sound unnecessarily grand.
That familiarity works in the film's favour. There is no need to reintroduce these characters to an Indian audience that has known them for years.
Is Doraemon: Castle Of The Undersea Devil Worth Watching?
For children and families, yes.
The movie has colourful animation, comedy, action and a straightforward emotional message about friendship and courage. It is also short enough to keep younger viewers engaged, with a runtime of around 1 hour and 42 minutes.
For adults who grew up watching Doraemon, the film works best as a nostalgic theatrical experience. Seeing Nobita, Doraemon and the gang on a large screen has its own charm.
But if you are expecting a tightly written fantasy adventure, the film may test your patience in the second half.
Doraemon: Castle Of The Undersea Devil (Image Credit: Instagram @sm_cinema)
Doraemon: Castle Of The Undersea Devil - Key Details
| Detail | Information |
| Name | Doraemon: Castle Of The Underground Devil |
| Release Date | October 2, 2026 |
| Language | Hindi, Tamil, Telugu |
| Runtime | 1 hour 42 minutes |
| Genre | Animation, Adventure, Comedy, Fantasy |
| Director | Tetsuo Yajima |
| Based On | Doraemon manga by Fujiko F. Fujio |
| OTT Release | Not announced |
Verdict: 3/5
Doraemon: Castle Of The Undersea Devil is an enjoyable family adventure with impressive animation and a familiar emotional core.
Its biggest weakness is that the story becomes unnecessarily complicated once the underwater kingdoms and larger conflict take centre stage. The movie is much more effective when it focuses on Nobita, Doraemon and their friends.
For children, it is an easy theatrical recommendation. For longtime Doraemon viewers, the nostalgia adds another reason to watch it.
FAQs
Q1. Is Doraemon: Castle Of The Undersea Devil worth watching?
A1. Yes, especially for children and longtime Doraemon fans. Its animation and emotional story are its biggest strengths.
Q2. Where can I watch Doraemon: Castle Of The Undersea Devil?
A2. The film is currently playing in theatres in India in Hindi, Tamil and Telugu.
Q3. Is Doraemon: Castle Of The Undersea Devil a remake?
A3. Yes. It is a modern remake of the 1983 Doraemon movie Nobita and the Castle of the Undersea Devil.