In Blue Box, Kyo Kasahara is voiced by Yuma Uchida in the Japanese version. In the English dub, Kyo is voiced by Alejandro Saab.
Japanese Voice Actor: Yuma Uchida
Date of Birth
Yuma Uchida was born on September 21, 1992.
About Yuma
Yuma Uchida is a prominent Japanese voice actor and singer affiliated with Intention, widely recognized for his dynamic range and strong presence in both lead and supporting roles. Since his debut in the 2010s, he has become one of the most in-demand male voice actors in the industry, known for portraying charismatic, energetic, and emotionally layered characters.
Uchida’s performances often balance confidence with subtle emotional depth, making him particularly effective in roles that blend humor, rivalry, and character growth. This aligns well with Kyo Kasahara in Blue Box, who serves as a supportive yet competitive friend within the story’s sports and relationship dynamics.
In addition to voice acting, Uchida has a successful music career, releasing singles and albums under King Records, further increasing his visibility in the anime industry.
Hometown
Yuma Uchida is from Tokyo, Japan.
Career Highlights
Yuma Uchida has an extensive list of major roles, including:
- Megumi Fushiguro in Jujutsu Kaisen — one of his most globally recognized roles
- Kyo Soma in Fruits Basket (2019)
- Ash Lynx in Banana Fish
- Iori Kitahara in Grand Blue
- Reo Mikage in Blue Lock
- Kyo Kasahara in Blue Box
His role as Megumi Fushiguro significantly elevated his international popularity, while performances like Ash Lynx demonstrated his ability to handle emotionally intense and complex characters.
Full Current Filmography
The following reflects documented credits from major databases such as Anime News Network and official agency listings. Due to the size of his career, this is a representative but not fully exhaustive filmography.
Anime (Selected Notable Roles, Chronological Where Available)
- Dimension W (2016) — Haruka Seameyer
- Banana Fish (2018) — Ash Lynx
- Grand Blue (2018) — Iori Kitahara
- The Idolmaster SideM (2017–) — Kaoru Sakuraba
- Fruits Basket (2019–2021) — Kyo Soma
- Jujutsu Kaisen (2020–) — Megumi Fushiguro
- SK8 the Infinity (2021) — Shadow (Hiromi Higa)
- Blue Lock (2022–) — Reo Mikage
- Blue Box (2026) — Kyo Kasahara
Video Games
- Genshin Impact — various roles (Japanese voice)
- The Idolmaster SideM — Kaoru Sakuraba
- Multiple roles across Japanese mobile and console titles
Music Career
- Active recording artist under King Records with multiple singles and albums tied to anime and original releases
Critical Reception
Yuma Uchida is widely praised for his charisma, vocal control, and emotional versatility.
- His performance as Ash Lynx in Banana Fish received significant critical acclaim for its intensity and emotional depth:
Anime News Network review (https://www.animenewsnetwork.com/review/banana-fish/.135000) - His portrayal of Megumi Fushiguro in Jujutsu Kaisen is frequently highlighted for its cool, restrained delivery and underlying emotional complexity:
Anime News Network review (https://www.animenewsnetwork.com/review/jujutsu-kaisen/.166810)
Critics and fans consistently recognize Uchida as one of the leading male voice actors of his generation, capable of elevating both action-heavy and character-driven roles.
Social Media
X: @yuma_u_official (https://x.com/yuma_u_official)
Instagram: @yuma_u_official (https://www.instagram.com/yuma_u_official/)
English Voice Actor: Alejandro Saab
Date of Birth
Alejandro Saab was born on November 15, 1994.
About Alejandro
Alejandro Saab is an American voice actor, content creator, and musician widely known in the anime community both for his professional voice work and his online presence under the name KaggyFilms. He has built a strong reputation in English anime dubbing, particularly through collaborations with Crunchyroll, Funimation, and Bang Zoom! Entertainment.
Saab is known for voicing confident, charismatic, and often competitive male characters, though he also demonstrates strong range in comedic and emotionally grounded roles. His performances frequently emphasize natural delivery and strong character personality, making him well-suited for roles like Kyo Kasahara in Blue Box, where charm, humor, and interpersonal dynamics are key.
In addition to voice acting, Saab is active in music and YouTube content creation, further expanding his influence within anime fandom culture.
Hometown
Alejandro Saab is from the United States (specific hometown is not consistently documented in official sources).
Career Highlights
Alejandro Saab has a growing list of notable roles, including:
- Cyno in Genshin Impact — one of his most recognized game roles
- Yuri in Fire Emblem Heroes
- Takezo Kurata in Kono Oto Tomare!: Sounds of Life
- Shall Fen Shall in How a Realist Hero Rebuilt the Kingdom
- Kyo Kasahara in Blue Box
His role as Cyno significantly increased his visibility in the global gaming audience, while his anime roles showcase his versatility across genres.
Full Current Filmography
The following reflects documented credits from major databases such as Anime News Network, game credits, and official cast listings. This is a representative but not fully exhaustive filmography.
Anime (Selected Notable Roles)
- Kono Oto Tomare!: Sounds of Life (2019) — Takezo Kurata
- How a Realist Hero Rebuilt the Kingdom (2021) — Shall Fen Shall
- Blue Box (2026) — Kyo Kasahara
Video Games
- Genshin Impact — Cyno
- Fire Emblem Heroes — Yuri
- Additional roles across RPGs and anime-style games
Other Media
- YouTube: KaggyFilms — anime-related content, voice acting showcases, and collaborations
- Music projects and covers associated with anime and gaming communities
Critical Reception
Alejandro Saab has received positive reception from fans and growing recognition within the industry.
- His performance as Cyno in Genshin Impact has been widely praised for capturing the character’s stoic yet subtly humorous personality, contributing to the character’s popularity.
- His role in Kono Oto Tomare! has also been appreciated for its grounded and sincere delivery, fitting the emotional tone of the series.
Across online communities, Saab is often recognized for his strong connection with fans and expressive performances, making him a rising and increasingly prominent figure in English anime dubbing.
Social Media
X: @KaggyFilms (https://x.com/KaggyFilms)
YouTube: KaggyFilms (https://www.youtube.com/c/KaggyFilms)
