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Seiji Sasaki

Voice Actor

Seiji Sasaki works as a Japanese actor and voice performer belonging to the Theatre Company Subaru troupe, and he voiced Bismarck in the Japanese-language version of One Piece, the Toei Animation anime.

Role: Voice Actor
Nationality: Japanese
Years Active: 1990-present
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One Piece Role

Sasaki lent his voice to Bismarck in the original Japanese broadcast of One Piece, part of a career built largely around dubbing and character work in Japanese animation and television. His grounded delivery reflects the stage training he brings from his work in theater.

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Career and Notable Roles

Active since 1990, Sasaki has become particularly recognized for dubbing dialogue for African American performers appearing in foreign film and television imported into Japan. He also performs on stage as a member of the Theatre Company Subaru troupe alongside his screen and recording work.

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Frequently Asked Questions

Who does Seiji Sasaki voice in One Piece?

Seiji Sasaki voices Bismarck in the Japanese-language version of One Piece, the Toei Animation anime. The performance reflects the stage training he brings from his work in theater.

What is Seiji Sasaki best known for?

Beyond his One Piece role, Sasaki is particularly recognized for dubbing dialogue for African American performers appearing in foreign film and television imported into Japan. He has worked in the industry since 1990.

What theater company is Seiji Sasaki part of?

Sasaki performs on stage as a member of the Theatre Company Subaru troupe, alongside his screen and recording work. This theater background feeds into his character work in anime and television.

When did Seiji Sasaki begin his acting career?

Sasaki has worked professionally since 1990, building a career centered largely on dubbing and character work in Japanese animation and television.

Who is Seiji Sasaki?

Seiji Sasaki is a Japanese actor and voice performer born in 1965. He is a member of the Theatre Company Subaru troupe and voices Bismarck in the Japanese version of One Piece.

Sources & Information

This content is original writing by Daddy Jim Anime based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.

Rights holders

All rights belong to their respective owners.

Character and scene imagery on this site is original artwork by Daddy Jim Anime, not screenshots or licensed imagery. Official cover art is used on three types of pages for editorial commentary:

  • Movie pages: theatrical posters and key visuals, credited to Toei Animation and Toei Company.
  • Game pages: official box art for the One Piece console and mobile games, credited to Bandai Namco.
  • Manga chapter pages: Jump Comics volume covers, credited to Shueisha and Eiichiro Oda.
  • Licensed imagery: Photographs of real people, including creators, voice actors and production staff, are used under licence from the rights holder or the applicable stock provider, or under the terms of a public licence permitting editorial use. Each such image is reproduced in its licensed form and remains the property of its owner.
  • Exceptions: Limited exceptions to the practices described above may apply to individual entries. Where an exception applies, it is noted on the entry itself alongside the applicable attribution. Rights holders may contact us regarding any attribution and it will be reviewed promptly.

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