You can find the Big Hero 6 Japanese dub on , where you can toggle between the original English and the Japanese voice tracks.
In the English version, Hiro is voiced by Ryan Potter. He’s earnest and youthful. But in Japanese, Hiro gets the voice of (known for Haikyuu!! ’s Yu Nishinoya and Blue Exorcist ’s Rin Okumura). Kimura brings a fiery, shonen-anime edge to Hiro. He makes the genius teenager sound hot-headed, vulnerable, and incredibly cool during the flight sequences. His emotional breakdown after Tadashi’s death is raw, visceral, and arguably more haunting than the original.
Big Hero 6's influence on Japanese pop culture extends beyond the film itself. The movie's characters, particularly Baymax, have become beloved icons in Japan, with numerous merchandise and spin-offs created to cater to fans. The film's success has also inspired a new generation of Japanese animators and filmmakers, who cite Big Hero 6 as an inspiration for their own work.
The Japanese dub is often discussed because it fundamentally shifts the film's marketing and tone to better fit the Japanese market: ベイマックス - The Dubbing Database
While the English version has "Immortals" by Fall Out Boy (a great track), the : "Story" by AKLO x SALU. This is crucial for the "hot" keyword.