---
name: "Kappei Yamaguchi"
canonical: "https://film.one/person/kappei-yamaguchi"
roles: ["Actor"]
born: "23 May 1965"
reviewed_on_fi1m: 1
updated: "2026-09-16T13:13:23.681194+00:00"
licence: "© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL."
---

# Kappei Yamaguchi

Actor. Born 23 May 1965 in Fukuoka, Fukuoka, Japan.

## Details

- **Work:** Actor
- **Born:** 23 May 1965, Fukuoka, Fukuoka, Japan
- **Also known as:** Mitsuo Yamaguchi, Kinoshita Toukichirou, Ushiku Kyouya, Yamaguchi Kappei, Yamaguchi Mitsuo, 木下 桃吉郎, 牛久 京也, 山口 勝平, 山口 光雄, کاپِی یاماگوچی

## Biography

Kappei Yamaguchi (born Mitsuo Yamaguchi, 23 May 1965) is a Japanese voice actor, actor and rakugoka from Fukuoka. He trained at Tokyo Announce University College after moving to the capital in 1984, and began his career in stage work with the 21st Century Fox theatre company before moving into voice acting.

Yamaguchi made his voice-acting debut in 1989 as the male Ranma Saotome in *Ranma ½*. He is known for long-running roles including Usopp in *One Piece* (1999–), L in *Death Note* (2006), InuYasha in *InuYasha* (2000–), and Shinichi Kudo and Kaito Kid in *Case Closed* (Detective Conan). He also voiced Tombo in the Studio Ghibli film *Kiki's Delivery Service* (1989).

He established his own agency, Gokū, and has worked in anime, video games, foreign-film dubbing and live-action. Yamaguchi has received seiyū awards and continues to appear in new productions.

*Sources: en.wikipedia.org, imdb.com, behindthevoiceactors.com.*

## On Fi1m (1)

- *Kiki's Delivery Service* (1989), Fi1m 86, as Tombo (voice) — [page](https://film.one/film/kikis-delivery-service.md)

## Also known for

- *One Piece* (1999), Usopp (voice)
- *Death Note* (2006), L (voice)
- *JUJUTSU KAISEN* (2020), Kechizu (voice)
- *Super Dragon Ball Heroes* (2018), Fu (voice)
- *Hunter x Hunter* (2011), Feitan (voice)
- *InuYasha* (2000), InuYasha (voice)
- *Cowboy Bebop* (1998), Rhint (voice)
- *JoJo's Bizarre Adventure* (2012), Shigechi (voice), Yo-Yo Ma

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© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL. Canonical: https://film.one/person/kappei-yamaguchi