In the original Japanese Dr. Slump anime, Dr. Mashirito is most strongly associated with Nachi Nozawa. In the English dub of Dragon Ball Super, the character is voiced by Barry Yandell. Public voice-credit sources also show that Dr. Mashirito had multiple Japanese performers across different Dr. Slump and later appearances, including Keiichi Noda and Ryōtarō Okiayu, but Nozawa is the most search-relevant answer for the classic original version.
Nachi Nozawa was a major Japanese actor, voice actor, narrator, and theatre director whose career extended far beyond one villain role. For Dr. Slump specifically, fan-facing franchise references identify him as the voice of Dr. Mashirito for a large stretch of the 1981 series, which is why his name remains the clearest answer for people looking up Mashirito’s original voice actor.
Japanese Voice Actor: Nachi Nozawa
Date of Birth
Nachi Nozawa was born on January 13, 1938. He died on October 30, 2010 in Tokyo.
About Nachi
Nachi Nozawa, born Yasutomo Nozawa, was a Japanese actor, voice actor, narrator, and theatre director from Tokyo. At the time of his death he was affiliated with Office PAC, and public biographies also note that he was especially famous in Japan as the dubbing voice for actors such as Al Pacino and Alain Delon.
Within anime and game fandom, Nozawa is widely remembered for roles such as Cobra in Space Cobra, Hyakkimaru in Dororo, and Alexander Anderson in Hellsing, in addition to Dr. Mashirito. That mix of anime acting, foreign-film dubbing, and stage work made him one of the more distinctive veteran voices of his era.
Hometown
His publicly documented hometown is Tokyo, Japan. More specific hometown information is not clearly documented in the sources I verified.
Career Highlights
For anime audiences, Nozawa’s defining credits include Dr. Mashirito in Dr. Slump Arale-chan, Cobra in Space Cobra, Hyakkimaru in Dororo, Alexander Anderson in Hellsing, and Oni-Ou in the Sakura Wars series. Public biographies also note that he was the first official voice of Lupin III in the 1969 pilot film, which gives him a notable place in anime history beyond Dr. Slump.
Another major part of his legacy was dubbing. Public biographies consistently emphasize that he became the established Japanese dubbing voice for several major Western actors, especially Al Pacino and Alain Delon, while also dubbing performers such as Bruce Willis, Dustin Hoffman, Christopher Walken, James Woods, and others.
Full Current Filmography
The list below reflects documented public credits from the sources I could verify here, especially broad biography pages and franchise-specific references. Because I did not find a single official master filmography page that is both complete and still publicly maintained, this should be treated as a documented credit list from cited public sources and may not be exhaustive.
Television Anime
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Dr. Slump Arale-chan — Dr. Mashirito (episodes 71–164 per franchise reference)
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Dororo — Hyakkimaru
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Space Cobra — Cobra
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Hellsing — Alexander Anderson
Games / Game-Related Roles
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Sakura Wars series — Oni-Ou
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Kingdom Hearts Re:Chain of Memories — Vexen
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Kingdom Hearts: Birth by Sleep — Even
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Crisis Core: Final Fantasy VII — credited acting role on IMDb
Film / Animation
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Lupin III pilot film (1969) — Lupin III (first official voice according to public biographies)
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Lensman — credited acting role on IMDb
Dubbing / Narration / Stage
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Official Japanese dubbing voice for Al Pacino
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Official Japanese dubbing voice for Alain Delon
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Also publicly documented as dubbing Bruce Willis, Dustin Hoffman, Christopher Walken, David McCallum, Don Johnson, Willem Dafoe, and James Woods
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Founder of the theatrical company Gekidan Bara-za in 1963
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Later became representative director of Office PAC
Critical Reception
Nachi Nozawa is generally remembered less as a single-franchise celebrity and more as a towering veteran of Japanese performance and dubbing culture. Public biographies consistently frame him as both an important anime performer and a major dubbing specialist, which suggests his reputation rests on range, authority, and longevity rather than one breakout role alone. That broader standing helps explain why his name still carries weight when people search for classic characters such as Dr. Mashirito.
Useful source links:
Behind The Voice Actors character page for Dr. Mashirito (https://www.behindthevoiceactors.com/characters/Dr-Slump/Dr-Mashirito/)
Behind The Voice Actors Dr. Slump & Arale-chan TV page for Dr. Mashirito (https://www.behindthevoiceactors.com/tv-shows/Dr-Slump-and-Arale-chan/Dr-Mashirito/)
Nachi Nozawa biography page (https://en.wikipedia.org/wiki/Nachi_Nozawa)
IMDb page for Nachi Nozawa (https://www.imdb.com/name/nm0637588/)
English Voice Actor: Barry Yandell
Date of Birth
Barry Yandell was born on July 3, 1968. Public biographical listings also identify his birthplace as Keller, Texas, USA.
About Barry
Barry Yandell is an American voice actor and stage performer. On his official site, he describes himself as a “Voice Actor / Stage Performer / Clinician / Adjudicator / Author,” and says his first anime voice role was Dolltaki in Dragon Ball GT. Public credit pages also list him as the English voice of Dr. Mashirito in Dragon Ball Super.
That makes Yandell the best documented English-language answer for Dr. Mashirito in modern franchise material, even though the character had multiple Japanese actors across different Dr. Slump eras.
Hometown
Yandell’s official website says he was born in Keller, Texas, and IMDb likewise lists Keller, Texas, USA as his birthplace. I did not find a more specific separately documented hometown beyond that.
Career Highlights
Public voice-actor databases and his talent-agency page identify Barry Yandell with roles such as Mr. 2 Bon Clay / Bentham in One Piece, William T. Spears in Black Butler, Yoki in Fullmetal Alchemist, Henry Henderson in SPY x FAMILY, and Dr. Mashirito in Dragon Ball Super. His official biography also highlights that his first anime role was Dolltaki in Dragon Ball GT, showing a long-running connection to the Dragon Ball franchise.
Full Current Filmography
The list below reflects documented public credits from Barry Yandell’s official site, talent-agency page, IMDb, and public voice-actor databases. Because I did not find one official complete master filmography with every role organized by year, this should be treated as a documented public credit list and may not be exhaustive.
Anime / Dub Acting
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Dragon Ball Super — Dr. Mashirito
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Dragon Ball GT — Dolltaki
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Dragon Ball Z Kai / Dragon Ball listings — Elder Moorie / Moori
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One Piece — Mr. 2 Bon Clay / Bentham, Helmeppo, and other listed roles in public databases
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Black Butler — William T. Spears
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Fullmetal Alchemist: Brotherhood / Fullmetal Alchemist — Yoki
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SPY x FAMILY — Henry Henderson
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Goblin Slayer — Dwarf Shaman
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Golden Kamuy — Wilk
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Deca-Dence — Hugin
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Black Clover — Gifso
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Fairy Tail — Rock Dragon / Sol / Bob
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Soul Eater — Little Demon
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SSSS.GRIDMAN — Alexis Kerib
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Island — Moritsugu Kurutsu
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Garo: The Animation / related listings — Zaruba
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Cop Craft — Zelada
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Rage of Bahamut — Charioce
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Corpse Princess — Tokihano Shiou
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Darker Than Black — Schroeder
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Genesis of Aquarion — Moroha
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Samurai 7 — Ayamaro
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Radiant — Narrator
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Initial D: Second Stage — Narrator
Films
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Summer Wars — credited acting role on IMDb
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Dragon Ball Super: Broly — credited acting role on IMDb
Video Games
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Borderlands 2 — Carlo the Bandit / Cursed Bandit / Erik Franks
Critical Reception
Barry Yandell is usually discussed in public profiles as a dependable character actor in English anime dubbing rather than as a heavily awards-centered celebrity performer. His agency page foregrounds standout roles in One Piece, Black Butler, SPY x FAMILY, and Fullmetal Alchemist, while convention coverage has specifically highlighted his work as William T. Spears and described him as a prominent North Texas voiceover artist.
Useful source links:
Barry Yandell official site (https://www.barryyandell.com/)
Barry Yandell talent page at Powell Talent (https://www.powelltalent.com/barry-yandell)
Barry Yandell IMDb page (https://www.imdb.com/name/nm1846338/)
Dr. Mashirito English credit page at Behind The Voice Actors (https://www.behindthevoiceactors.com/tv-shows/Dragon-Ball-Super/Dr-Mashirito/)
Social Media
X: @BarryYandellVA (https://twitter.com/BarryYandellVA) — linked from his Powell Talent page; the account currently appears suspended.
Instagram: @barryyandell (https://instagram.com/barryyandell) — linked from his Powell Talent page.
