Robert Downey Jr. Surprises Doctor Doom’s Japanese Voice Actor With a Personal Message, and His Reaction Is Priceless
Robert Downey Jr.’s return to the Marvel Cinematic Universe as Doctor Doom is one of the most anticipated moments in the franchise’s history. ‘Avengers: Doomsday’ marks his first MCU appearance in about 7 years since ‘Avengers: Endgame’, and this time he is playing the villain.
In Japan, his return comes with an emotional subplot. For years, Japanese audiences heard Downey Jr.’s characters through the late Keiji Fujiwara, who voiced him in Japanese from ‘Iron Man’ onward and through ‘Endgame’, before he died at the age of 55.
Downey Jr. announced the new voice of Doom in Japan himself. In a special video message to Japanese fans, he revealed that veteran voice actor Tomoyuki Morikawa will voice Doctor Doom in the Japanese dub, calling the choice the best.
The actor thanked Morikawa, said he was looking forward to Japanese audiences hearing his performance, and said Fujiwara’s legacy would carry on. He also invited fans to see the film in theaters.
Marvel Studios Japan has now shared Morikawa’s reaction after he got an early look at the message. The voice actor joked that it gave him a thrill and asked whether the video was made with AI, adding that the footage he was shown went far beyond what he had imagined.
ロバート・ダウニー・Jr.からのメッセージを 一足早く見られていた ドゥーム役日本版声優の森川智之さん💫 (@moriax291) ⠀ その様子を特別にお届け👀 ⠀ 💬森川さんコメント Q:ロバート・ダウニーJr.ご本人からの声優就任メッセージをご覧になりいかがですか? A:ちょっとグッときちゃいましたね。これAIじゃないですよね(笑)?本当に想像していたよりはるかに上をいく映像を見させてもらいました。世界で名だたる映画俳優ロバート・ダウニーJr.さんからの直々のコメントだったので、僕は声優をしてもう40年なんですが、その40年の集大成としてしっかりと演じきりたいと思います! ⠀ Q:藤原啓治さんの後を継ぎ、MCU作品でロバート・ダウニーJr.の吹替を担当することにどのような想いがありますか。 A:藤原さんは同期でもあるので、ずっと声優業界の新人として二人でやってきた時期も長かったので、彼の想いも含めてしっかりと反映させながら皆さんに楽しんでもらえる作品にしたいなと思います。がっかりさせたくないという思いも強くあります! ⠀ 『アベンジャーズ/ドゥームズデイ』 12/18[金]劇場公開🎬
— マーベル・スタジオ[公式] (@MarvelStudios_J) November 2, 2026
Morikawa said that getting a personal message from a world-famous actor like Downey Jr. meant a great deal. He noted that he has worked as a voice actor for 40 years and wants to treat the role as the culmination of that career by giving it everything he has.
Asked how he feels about succeeding Fujiwara as Downey Jr.’s voice in the MCU, Morikawa shared a personal connection. He explained that he and Fujiwara started at the same time and spent a long period working side by side as newcomers in the voice acting industry.
Chris Evans and Robert Downey Jr in new promo for ‘AVENGERS: DOOMSDAY’. https://t.co/Jb0zB6DVZk
— Avengers Updates (@AvengersUpdated) October 28, 2026
He said he wants to carry Fujiwara’s feelings into the performance while making a film everyone can enjoy. Morikawa added that he strongly does not want to let fans down. This isn’t the first time Morikawa has taken over one of Fujiwara’s signature roles. He also succeeded him as the voice of Hiroshi Nohara, Shin-chan’s father, in the long-running anime ‘Crayon Shin-chan’.
Stand together. Avengers: Doomsday arrives in theaters everywhere December 18. Get your tickets now: https://t.co/gA9Cd3iqUk https://t.co/XVQHe7sEoE
— Marvel Studios (@MarvelStudios) October 25, 2026
Morikawa is also known in Japan as Kagaya Ubuyashiki in ‘Demon Slayer’ and as the regular Japanese voice of Tom Cruise in dubbed films. That track record makes him a natural pick to take on one of Marvel’s most iconic villains. Doom’s voice was the last piece of the Japanese cast to be announced. Disney had already revealed 29 voice actors in October, with Doom’s role kept under wraps until now.
Yuichi Nakamura returns as the voice of Chris Evans’ Steve Rogers, while Kenta Miyake voices Chris Hemsworth’s Thor. The lineup also includes Maaya Sakamoto as Vanessa Kirby’s Sue Storm, Takeo Koyasu as Pedro Pascal’s Reed Richards, and Daisuke Hirakawa as Tom Hiddleston’s Loki.
New trailer for ‘Avengers: Doomsday’ In theaters December 18 https://t.co/1wsiTk1Nnv
— Culture Crave 🍿 (@CultureCrave) August 15, 2026
The film opens in Japan on December 18, the same day as its United States release. A Japanese trailer was released alongside Downey Jr.’s video message. Doom is being positioned as the franchise’s biggest threat yet, and his identity and background are still being kept under wraps.
The film will screen in INFINITY VISION, Dolby Cinema, 4DX, SCREENX, and Premium Large Format theaters in Japan. For Japanese fans, hearing Morikawa bring Doom to life while honoring Fujiwara’s memory should make the experience all the more meaningful.
What do you think of Tomoyuki Morikawa taking over as Doctor Doom’s Japanese voice actor?
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