In My Hero Academia: Vigilantes (2026), the vigilante Knuckleduster—a brutal, no-nonsense fighter and mentor figure—is voiced in Japanese by Kazuya Nakai. Known for his deep, rough-edged voice and commanding delivery, Nakai brings a gritty intensity to the character. As of now, an official English dub voice actor for Knuckleduster has not been publicly announced.
Japanese Voice Actor: Kazuya Nakai
Date of Birth
November 25, 1967
About Kazuya
Kazuya Nakai is a veteran Japanese voice actor celebrated for his distinctive low, gravelly voice and strong presence in action-oriented roles. He frequently portrays hardened warriors, anti-heroes, and battle-tested mentors—making him an ideal fit for Knuckleduster, a character defined by physical strength, experience, and a morally gray approach to justice.
Hometown
Kobe, Hyōgo Prefecture, Japan
Career Highlights
- Best known as Roronoa Zoro in One Piece
- Voiced Hijikata Toshirō in Gintama
- Played Date Masamune in Sengoku Basara
- Known for Mugen in Samurai Champloo
- Frequently cast in roles requiring toughness, charisma, and combat intensity
Full Current Filmography
The following list reflects documented credits from reputable sources and may not be exhaustive.
Anime Series
- One Piece (1999– ) — Roronoa Zoro
- Gintama (2006–2021) — Hijikata Toshirō
- Samurai Champloo (2004–2005) — Mugen
- Sengoku Basara (2009– ) — Date Masamune
- Blood Blockade Battlefront (2015–2017) — Zapp Renfro
- My Hero Academia: Vigilantes (2026) — Knuckleduster
Anime Films
- One Piece films — Roronoa Zoro
- Gintama films — Hijikata Toshirō
- Sengoku Basara: The Last Party (2011) — Date Masamune
Video Games (Selected)
- Sengoku Basara series — Date Masamune
- Dynasty Warriors / Samurai Warriors — various roles
- One Piece games — Roronoa Zoro
Dubbing (Selected)
- Known for Japanese dubbing of Western films and animated works, often voicing rugged or rebellious characters
Critical Reception
Kazuya Nakai is widely praised for his commanding vocal presence and ability to embody tough, battle-hardened characters. His performances often carry a mix of intensity and charisma, making even abrasive characters compelling. His casting as Knuckleduster has been viewed as an excellent match, reinforcing the character’s raw, street-level approach to heroism.
Our Sources
- Crunchyroll News – My Hero Academia: Vigilantes announcements (https://www.crunchyroll.com/news/)
- Wikipedia – Kazuya Nakai (https://en.wikipedia.org/wiki/Kazuya_Nakai)
- Behind The Voice Actors – Kazuya Nakai profile (https://www.behindthevoiceactors.com/Kazuya-Nakai/)
Social Media
No verified official public social media accounts are consistently documented for Kazuya Nakai.
