Voice actor
Kappei Yamaguchi
山口勝平
Profile data: AniList (opens in a new tab)
Biography
Also known as
- Mitsuo Yamaguchi (山口光雄)
- Occupations
- Voice Actor
- Years active
- 1988–present
Affiliated with Gokū and 21st Century Fox. Best known for the roles of Ranma Saotome (Ranma ½), Tombo (Kiki's Delivery Service), Yattaro (Kyattou Ninden Teyandee), InuYasha (InuYasha), L (Death Note), Usopp (One Piece), Hideyoshi (Law of Ueki), and Kaito Kid and Shinichi Kudo (Detective Conan). He made his first public appearance in North America at Otakon 2008.
Father of Ryuunosuke and Akane Yamaguchi.
Source: AniList (opens in a new tab) · updated
Voice acting (69 titles in the catalog)
-
Assassination Classroom the Movie: Our Time
Winter 2026
- Futoshi SupportingJapanese
-
Daemons of the Shadow Realm
Spring 2026
- Hikaru Kagemori SupportingJapanese
-
Go For It, Nakamura-kun!!
Spring 2026
- Makunouchi SupportingJapanese
-
Gintama the Movie 2026: Yoshiwara in Flames
Winter 2026
- Sarukaku SupportingJapanese
-
ISHURA Season 2
Winter 2025
- Krafnir SupportingJapanese
-
Detective Conan: One-Eyed Flashback
Spring 2025
- Conan Edogawa MainJapanese
-
Ranma1/2 (2024) Season 2
Fall 2025
- Ranma Saotome MainJapanese
-
One Piece Log: Fish-Man Island Saga
Fall 2024
-
Detective Conan: The Million-dollar Pentagram
Spring 2024
- Kaito Kuroba MainJapanese
-
Ranma1/2 (2024)
Fall 2024
- Ranma Saotome MainJapanese
-
ONE PIECE FAN LETTER
Fall 2024
- Usopp SupportingJapanese
-
- Shin SupportingJapanese











