Zenitsu Agatsuma, the lightning-fast Demon Slayer known for his cowardly personality and incredible combat instincts in Demon Slayer: Kimetsu no Yaiba, is voiced by Hiro Shimono in the original Japanese version and Aleks Le in the English dub. Both actors earned widespread praise for balancing Zenitsu’s over-the-top comedy, emotional panic, and explosive battle intensity throughout the anime and film series. (behindthevoiceactors.com)
Hiro Shimono – Japanese Voice of Zenitsu Agatsuma
Date of Birth
April 21, 1980
About Hiro
Hiro Shimono is a veteran Japanese voice actor and singer known for energetic comedic performances, emotionally expressive characters, and high-pitched vocal versatility. His portrayal of Zenitsu Agatsuma in Demon Slayer became one of the anime’s most recognizable performances, especially for the way he transitions between frantic screaming comedy and intense battle focus.
Shimono gives Zenitsu an exaggerated emotional delivery that emphasizes the character’s fear, insecurity, and dramatic personality, while still allowing his moments of courage and determination to feel genuine. His performance during Zenitsu’s Thunder Breathing scenes became particularly iconic among anime fans.
Outside of Demon Slayer, Shimono has maintained a major presence in anime for decades through leading and supporting roles across comedy, fantasy, romance, and action series.
Hometown
Tokyo, Japan
Career Highlights
Some of Hiro Shimono’s best-known anime roles include:
- Zenitsu Agatsuma — Demon Slayer: Kimetsu no Yaiba
- Connie Springer — Attack on Titan
- Dabi — My Hero Academia
- Keima Katsuragi — The World God Only Knows
- Yoshino — Date A Live
- Nacht Faust — Black Clover
- Adult Momonosuke — One Piece
- Syo Kurusu — Uta no Prince-sama
- Rex — Xenoblade Chronicles 2 (Japanese voice)
He is also known for music releases, radio appearances, and extensive game voice acting work.
Full Current Filmography
The following list reflects documented anime and game credits from publicly available sources and may not be exhaustive.
Television Anime
- Demon Slayer: Kimetsu no Yaiba — Zenitsu Agatsuma
- Attack on Titan — Connie Springer
- My Hero Academia — Dabi
- Black Clover — Nacht Faust
- Date A Live — Yoshino
- The World God Only Knows — Keima Katsuragi
- Uta no Prince-sama — Syo Kurusu
- One Piece — Adult Momonosuke
- Fairy Tail — additional roles
- Tokyo Ghoul — supporting roles
- Bleach — supporting roles
Anime Films
- Demon Slayer: Mugen Train — Zenitsu Agatsuma
- Demon Slayer: To the Swordsmith Village — Zenitsu Agatsuma
- Demon Slayer: To the Hashira Training — Zenitsu Agatsuma
- Uta no Prince-sama film projects — Syo Kurusu
Video Games
- Demon Slayer: The Hinokami Chronicles — Zenitsu Agatsuma
- Xenoblade Chronicles 2 — Rex (Japanese voice)
- Granblue Fantasy — character roles
- Fire Emblem Heroes — multiple characters
- Genshin Impact — additional Japanese voice work
Critical Reception
Hiro Shimono’s portrayal of Zenitsu is widely praised for turning an intentionally exaggerated comic-relief character into one of the anime’s most emotionally memorable heroes. Fans frequently highlight his dramatic screaming scenes, comedic timing, and intense battle performances during Thunder Breathing sequences.
His ability to shift instantly from cowardly panic to calm combat focus became one of the defining traits of Zenitsu in the anime adaptation.
Our Sources
Behind The Voice Actors – Zenitsu Agatsuma (Demon Slayer)
(https://www.behindthevoiceactors.com/tv-shows/Demon-Slayer-Kimetsu-no-Yaiba/Zenitsu-Agatsuma/)
Hiro Shimono – Wikipedia
(https://en.wikipedia.org/wiki/Hiro_Shimono)
IMDb – Demon Slayer: Kimetsu no Yaiba Full Cast & Crew
(https://www.imdb.com/title/tt9335498/fullcredits/)
Anime News Network Encyclopedia – Hiro Shimono
(https://www.animenewsnetwork.com/encyclopedia/people.php?id=4748)
Social Media
Official Website: https://shimonohiro.com/
X (Twitter): https://x.com/shimono_kousiki
Aleks Le – English Voice of Zenitsu Agatsuma
Date of Birth
March 12, 1999
About Aleks
Aleks Le is an American voice actor known for energetic anime protagonists, emotionally intense performances, and major roles in video games and animation. His portrayal of Zenitsu Agatsuma in the English dub of Demon Slayer received widespread praise for capturing the character’s frantic comedy, emotional vulnerability, and explosive combat intensity.
Le gives Zenitsu an exaggerated and emotionally expressive vocal performance that fully embraces the character’s dramatic panic attacks, loud outbursts, and comedic personality. At the same time, his delivery during Zenitsu’s Thunder Breathing scenes becomes calm, focused, and powerful, helping preserve the dramatic contrast that defines the character.
Following the success of Demon Slayer, Aleks Le rapidly became one of the most recognizable younger voices in anime dubbing and gaming.
Hometown
The United States (specific hometown is not widely publicly documented)
Career Highlights
Some of Aleks Le’s best-known anime and game roles include:
- Zenitsu Agatsuma — Demon Slayer: Kimetsu no Yaiba
- Luke — Street Fighter 6
- Sung Jinwoo — Solo Leveling
- Anos Voldigoad — The Misfit of Demon King Academy (later dub casting)
- Mikey — Tokyo Revengers
- Yamato — One Piece (selected game/project appearances)
- Additional voices — Cyberpunk: Edgerunners
- Additional voices — SPY × FAMILY
He is also heavily involved in fighting games, RPGs, and streaming content creation.
Full Current Filmography
The following list reflects documented credits from publicly available sources and may not be exhaustive.
Television Anime
- Demon Slayer: Kimetsu no Yaiba — Zenitsu Agatsuma
- Solo Leveling — Sung Jinwoo
- Tokyo Revengers — Mikey
- The Misfit of Demon King Academy — Anos Voldigoad (later dub work)
- SPY × FAMILY — additional voices
- Cyberpunk: Edgerunners — supporting voices
- Bleach: Thousand-Year Blood War — additional voices
- Blue Lock — supporting roles
- One Piece — supporting voices
Anime Films
- Demon Slayer: Mugen Train — Zenitsu Agatsuma
- Demon Slayer: To the Swordsmith Village — Zenitsu Agatsuma
- Demon Slayer: To the Hashira Training — Zenitsu Agatsuma
Video Games
- Street Fighter 6 — Luke
- Demon Slayer: The Hinokami Chronicles — Zenitsu Agatsuma
- Genshin Impact — additional voices
- Persona 3 Reload — supporting roles
- Call of Duty projects — voice work
- SMITE — additional voices
Critical Reception
Aleks Le’s portrayal of Zenitsu has been widely praised for fully committing to the character’s chaotic emotional energy while still delivering emotionally sincere performances during dramatic moments.
Fans frequently highlight his comedic screaming scenes, emotional breakdowns, and sudden tonal shift during Thunder Breathing sequences as some of the most memorable aspects of the English dub. His chemistry with Zach Aguilar’s Tanjiro and Abby Trott’s Nezuko is also commonly praised by dub audiences.
Our Sources
Behind The Voice Actors – Zenitsu Agatsuma (Demon Slayer)
(https://www.behindthevoiceactors.com/tv-shows/Demon-Slayer-Kimetsu-no-Yaiba/Zenitsu-Agatsuma/)
IMDb – Aleks Le
(https://www.imdb.com/name/nm10448770/)
Anime News Network Encyclopedia – Aleks Le
(https://www.animenewsnetwork.com/encyclopedia/people.php?id=182373)
Crunchyroll – Demon Slayer English Dub Cast Information
(https://www.crunchyroll.com/)
Social Media
X (Twitter): https://x.com/AleksLeVO
YouTube: https://www.youtube.com/@AleksLeVO
Official Website: https://www.aleksle.com/
