Kappei Yamaguchi
Voice ActorKappei Yamaguchi is a prolific Japanese voice actor best known as the original voice of Usopp in One Piece, alongside decades of major roles across anime, live-action, and rakugo.
One Piece Role
Yamaguchi provides the Japanese voice of Usopp, one of the Straw Hat crew, in the Toei Animation series One Piece. He has also taken on a handful of guest parts elsewhere in the show, including Nitro, Raijin, Rabbitman, and Randolph.
Career and Notable Roles
Performing under the stage name Kappei Yamaguchi, born Mitsuo Yamaguchi in 1965, he broke into voice work in 1989 playing the male incarnation of Ranma Saotome in Ranma ½. His long list of credits includes Inuyasha in Inuyasha, L in Death Note, playing both Shinichi Kudo and his alter ego Kaito Kid in Case Closed, and Teddie in Persona 4. He is also a trained rakugo performer, and both of his children have followed him into voice acting.
Frequently Asked Questions
Who does Kappei Yamaguchi voice?
Kappei Yamaguchi provides the Japanese voice of Usopp, one of the Straw Hat crew, in the Toei Animation series One Piece. He has also taken on guest parts elsewhere in the show, including Nitro and Raijin.
Do L and Usopp have the same voice actor?
Yes, Kappei Yamaguchi voices both L in Death Note and Usopp in One Piece, two of the many major characters across his long voice acting career.
What are some interesting facts about Kappei Yamaguchi?
Yamaguchi performs under a stage name; he was born Mitsuo Yamaguchi in 1965. He is also a trained rakugo performer, and both of his children have followed him into voice acting.
What was Kappei Yamaguchi's breakout role?
Yamaguchi broke into voice work in 1989 playing the male incarnation of Ranma Saotome in Ranma ½.
What other major anime roles has Kappei Yamaguchi played?
Yamaguchi's long list of credits includes Inuyasha in Inuyasha, Shinichi Kudo and his alter ego Kaito Kid in Case Closed, and Teddie in Persona 4.
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Sources & Information
This content is original writing by Daddy Jim Headquarters based on the One Piece anime series, manga, and official materials. Episode and chapter references are cited where applicable.
Character and scene imagery on this site is original artwork by Daddy Jim Headquarters, 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.
Official resources:
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