It has Doraemon announced that the band "sumika" will be performing the theme song "Honto" for the latest film in the Doraemon the Movie series, " Doraemon : Fujiko F. Fujio and the Castle of Nobita's Undersea Rock," based on the popular anime "Doraemon" originally created by Fujiko F. Fujio. This marks the first time the band has performed a theme song for a Doraemon movie. The theme song will be a new song written specifically for this film. The latest film is a rebirth of "Doraemon : Nobita and the Castle of Devil's Undersea Rock," which was released in 1983 and has long been loved by fans, after approximately 43 years.
Kenta Kataoka of "sumika" said, "Doraemon has been a part of my life since I was a child. I was filled with a feeling of great joy and a bit of wonder, and before I knew it, I had bought a lot of dorayaki and gone home. Even now as I write this, I feel like I'm in a dream." He reflected on his feelings when the theme song was decided, saying, "Doraemon and the Castle of Nobita's Undersea Rock," released in 1983, "I had seen it once as a child, and watched it again while composing the song for this film. As a child, I thought, 'I wonder if this kind of thing can happen at the bottom of the ocean,' but when I watched it as an adult, I thought, 'I wonder if this kind of thing can happen 'even' at the bottom of the ocean.' I was surprised at how much your perspective can change with age and experience." He spoke of the appeal of the work, which he experienced once again.
Member Arai Tomoyuki commented, "What should have been a fun vacation turns into unexpected trouble, with anxiety and excitement in the unknown world, and moments when an important bond is formed as people come to understand each other's feelings. I'm thrilled to now be able to help deliver the story that made my heart flutter as a child. I hope that many people will enjoy this work, and that our music will help in that regard."
Member Ogawa Toshiyuki said, "We created this song with sincerity, in a straightforward and warm way, so that it would lead to answers. It is a song with a strong core that was only possible because of the world of Doraemon. I was inspired by the way Nobita and Nobita discuss and move forward in response to the various events that occur in the world of the movie, so I played a straightforward piano piece. I myself am really looking forward to seeing it in the cinema."
The latest trailer featuring the theme song has been released on YouTube. With Doraemon's encouragement, Nobita and his friends finish their homework and use the Anywhere Door to head to a never-before-seen underwater world. Making full use of Doraemon 's secret gadgets, the Underwater Buggy and the Tekio Light, Doraemon, Nobita , and his friends embark on a grand adventure to solve the mysteries of the undersea world. At the end of the trailer, they receive the news that "Demon's Rock Castle...has begun to move!!"
Advance tickets will go on sale at cinemas nationwide from December 5th. As a special gift for purchasers, they will receive a rubber keychain of Doraemon riding an underwater buggy, "Let's Go!! Buggy Dora." It has also been announced that a booklet titled "Doraemon the Movie: Nobita and the New Undersea Castle of Nobita'Undersea Exploration Manga Book'" will be distributed as a special gift to moviegoers.
The latest film is set at the bottom of the ocean, where Doraemon and his friends embark on a great adventure in a mysterious and mysterious underwater world. Directed by Tetsuo Yajima, who has worked on storyboards and direction for the Doraemon TV anime, as well as the 2007 film Nobita's New Great Adventure into the Underworld: Seven Magicians, the 2011 film Nobita and the New Steel Troops: Wings of Angels, and the 2024 film Nobita and the Earth Symphony Orchestra. This marks Yajima's first time directing a Doraemon film. Isao Murayama, who has worked on numerous episodes of the Doraemon TV anime, will be in charge of the script. Voice actor Shoya Chiba will play El, a soldier from the Mu Federation, the underwater people's nation, and Ryo Hirohashi will play the secret gadget, the Underwater Buggy. The film is scheduled for release on February 27, 2026.
