# Takehito Koyasu (子安武人)
**Takehito Koyasu** (子安武人, born 1967) is a Japanese voice actor from [Kanagawa Prefecture](https://www.edgepedia.org/kanagawa-prefecture), known for a wide range of anime, game, and dubbing roles and for founding his own talent agency, T's Factory.[1](https://tsf-official.com/talent/takehito-koyasu/) His best-known parts include DIO in *JoJo's Bizarre Adventure*, Takasugi Shinsuke in *Gintama*, Zechs Merquise in *Mobile Suit Gundam Wing*, and Snufkin in the Moomin anime.[2](https://www.animatetimes.com/news/details.php?id=1711357451)
| Key fact | Detail |
|---|---|
| Born | 1967, Kanagawa Prefecture, Japan[1](https://tsf-official.com/talent/takehito-koyasu/) |
| Agency | Founder of T's Factory (有限会社ティーズファクトリー), which represents him[1](https://tsf-official.com/talent/takehito-koyasu/) |
| Signature anime roles | DIO (*JoJo's Bizarre Adventure*), Takasugi Shinsuke (*Gintama*), Zechs Merquise (*Gundam Wing*), Mu La Flaga (*Gundam SEED*), Kuzan/Aokiji (*One Piece*), Kururu Sergeant (*Keroro Gunso*)[1](https://tsf-official.com/talent/takehito-koyasu/) |
| Other noted roles | Snufkin (*Moomin*), Ryosuke Takahashi (*Initial D*), Benno (*Ascendance of a Bookworm*), Claudia Hodgins (*Violet Evergarden*), Roswaal (*Re:Zero*), Zeke Yeager (*Attack on Titan*)[2](https://www.animatetimes.com/news/details.php?id=1711357451) • [1](https://tsf-official.com/talent/takehito-koyasu/) |
| Game roles | Jade Curtiss (*Tales of the Abyss*), Sengoku Basara's Sasuke Sarutobi, Suou Tatsuya (*Persona 2*), Ozymandias and Hans Christian Andersen (*Fate/Grand Order*)[1](https://tsf-official.com/talent/takehito-koyasu/) • [3](https://www.animatetimes.com/news/details.php?id=1555850931) |
| Production work | Devised the original concept for *Weiß Kreuz* and produced it, also starring as Aya (Fujimiya Ran)[4](https://www.fashion-press.net/profiles/6974) |
| Family | His son, Koki Koyasu, is also a voice actor[5](https://www.allcinema.net/person/pdf/1088740) |
## Early life and path to voice acting
Koyasu aimed to be a film actor in middle school, but in high school, after watching *Sayonara Galaxy Express 999: Andromeda Terminal Station*, he became aware that performers could act through voice alone and turned toward voice acting.[4](https://www.fashion-press.net/profiles/6974) His debut role came in *Dondon Domeru to Ron*.[6](https://game.fandom.com/ja/wiki/%E5%AD%90%E5%AE%89%E6%AD%A6%E4%BA%BA)
An early career landmark was *Uchū no Kishi Tekkaman Blade*, in which he played Shinya Aiba, the antagonist Tekkaman Evil; fans commenting in Animate Times' anniversary surveys describe the role as one in which he poured extraordinary commitment, and it is often cited as the part that established him.[3](https://www.animatetimes.com/news/details.php?id=1555850931)
## Range and notable roles
Koyasu's casting spans cool villains, elegant aristocrats, and broad comedy. In the Gundam franchise alone he has played Zechs Merquis/Milliardo Peacecraft in *New Mobile Report Gundam Wing*, Mu La Flaga in *Mobile Suit Gundam SEED* and its sequel, and Gym Ghingham in *[Turn A Gundam](https://www.edgepedia.org/turn-a-gundam)*.[1](https://tsf-official.com/talent/takehito-koyasu/) • [7](https://wikis.pro/%E5%AD%90%E5%AE%89%E6%AD%A6%E4%BA%BA) In *JoJo's Bizarre Adventure* he voices DIO, the part readers of ITmedia's netlab survey ranked first among his television anime characters in a 2023 poll that drew 2,869 votes.[8](https://nlab.itmedia.co.jp/research/articles/2555203/)
**Long-running series roles** include Kururu Sergeant, the science-minded alien in *Keroro Gunso*, and Kuzan (Aokiji) in *One Piece*.[1](https://tsf-official.com/talent/takehito-koyasu/) In *Gintama* he plays the antagonist Takasugi Shinsuke, a role Animate Times readers repeatedly selected among his representative works.[2](https://www.animatetimes.com/news/details.php?id=1711357451) Softer parts show the other side of his range: Snufkin in *Tanoshii Moomin Ikka*, the gentle Hoshi-Sumo in *Fushigi Yugi*, the supportive father Hiroshi Honda in *Major*, and Claudia Hodgins in *Violet Evergarden*.[2](https://www.animatetimes.com/news/details.php?id=1711357451) • [3](https://www.animatetimes.com/news/details.php?id=1555850931)
In games he is the voice of Jade Curtiss in *Tales of the Abyss*, Sasuke Sarutobi in the *Sengoku Basara* series, Suou Tatsuya in *Persona 2*, and, in the *Fate* franchise, [Ozymandias](https://www.edgepedia.org/ozymandias) and the Caster version of [Hans Christian Andersen](https://www.edgepedia.org/hans-christian-andersen).[1](https://tsf-official.com/talent/takehito-koyasu/) • [3](https://www.animatetimes.com/news/details.php?id=1555850931) He also works in dubbing, with Japanese-language roles in films such as *Shazam!* (Dr. Sivana) and *Suicide Squad* (the Joker).[1](https://tsf-official.com/talent/takehito-koyasu/)
## Weiß Kreuz and production work
Koyasu has created work as well as performed in it. For *Weiß Kreuz*, a series about a team of assassin-florists, he devised the original concept, served as producer, and took his first starring role as Aya (Fujimiya Ran).[4](https://www.fashion-press.net/profiles/6974) The series remains one of the works fans most often name when asked for his representative roles.[2](https://www.animatetimes.com/news/details.php?id=1711357451)
## Acting approach and reception
Koyasu has described his goal as rendering two-dimensional characters as three-dimensional people, an approach he has connected to what he learned playing Snufkin.[4](https://www.fashion-press.net/profiles/6974) Fan surveys organized by Animate Times for his birthday, which falls on 5 May, have collected reader comments across successive years (2019, 2020, 2021, and 2024 editions), with roles from *Shura no Toki*'s soft-spoken star to the unhinged [Bobobo-bo Bo-bobo](https://www.edgepedia.org/bobobo-bo-bo-bobo) cited as favorites, a spread that mirrors the breadth of his casting.[2](https://www.animatetimes.com/news/details.php?id=1711357451) • [9](https://www.animatetimes.com/news/details.php?id=1587096589) • [3](https://www.animatetimes.com/news/details.php?id=1555850931)
He remains active in new productions: recent and upcoming screen credits include *Gundam SEED Freedom* (2024) as Mu La Flaga, the *Attack on Titan* compilation film *The Last Attack* (2024) as Zeke Yeager, and a new *Keroro Gunso* theatrical film scheduled for 2026 as Kururu Sergeant.[10](https://eiga.com/person/31222/movie/)
## References
1. [子安 武人 プロフィール, 有限会社ティーズファクトリー (T's Factory official talent page)](https://tsf-official.com/talent/takehito-koyasu/)
2. [声優・子安武人さん、アニメキャラクター代表作まとめ（2024年版）, アニメイトタイムズ](https://www.animatetimes.com/news/details.php?id=1711357451)
3. [声優・子安武人さん、アニメキャラクター代表作まとめ, アニメイトタイムズ](https://www.animatetimes.com/news/details.php?id=1555850931)
4. [子安武人のプロフィール・経歴・出演映画, ファッションプレス](https://www.fashion-press.net/profiles/6974)
5. [子安光樹, allcinema](https://www.allcinema.net/person/pdf/1088740)
6. [子安武人, ゲーム情報ウィキ (Fandom)](https://game.fandom.com/ja/wiki/%E5%AD%90%E5%AE%89%E6%AD%A6%E4%BA%BA)
7. [子安武人, 中文百科](https://wikis.pro/%E5%AD%90%E5%AE%89%E6%AD%A6%E4%BA%BA)
8. [声優「子安武人」が演じたテレビアニメキャラ人気ランキングTOP31, ねとらぼリサーチ (ITmedia)](https://nlab.itmedia.co.jp/research/articles/2555203/)
9. [声優・子安武人さん、アニメキャラクター代表作まとめ（2020年版）, アニメイトタイムズ](https://www.animatetimes.com/news/details.php?id=1587096589)
10. [子安武人：関連作品（映画）, 映画.com](https://eiga.com/person/31222/movie/)
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*Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Screen people and creators › Voice performers › Japanese voice performers › Surnames symbols to M*
*Initially written Sep 17, 2026 · Reviewed: Sep 18, 2026; Oct 25, 2026 · Edited: Sep 18, 2026; Oct 12, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
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License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license