Mitsuo Yamaguchi (山口 光雄, Yamaguchi Mitsuo), better known by his stage name of Kappei Yamaguchi (山口 勝平, Yamaguchi Kappei) is a Japanese voice actor and actor from Fukuoka, affiliated with Gokū and 21st Century Fox. He is best known for the roles of Ranma Saotome (Ranma), Jackson Neil (Miracle Girls), Tombo (Kiki's Delivery Service), Yattaro (Kyattou Ninden Teyandee), InuYasha (InuYasha), Ryuichi Sakuma (Gravitation), L (Death Note), Usopp (One Piece), Hideyoshi (Law of Ueki), and Kaito Kid and Shinichi Kudo (Case Closed). His current starring roles include that of Raimon "Monta" Taro, the Deimon Devil Bats' ace receiver in Eyeshield 21.
Yamaguchi has appeared in eroge as Kyōya Ushihisa (牛久 京也, Ushihisa Kyōya). He made his first public appearance in North America at Otakon 2008; and was also a guest at Sakura-Con 2009. Yamaguchi's third appearance to date has been at Animazement in 2010.
He is married and has a daughter, Akane Yamaguchi (山口 茜), and a son, Ryunosuke Yamaguchi (山口 竜之介), who also are voice actors.
Description above from the Wikipedia article Kappei Yamaguchi, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Known For
Dream 9 Toriko & One Piece & Dragon Ball Z Super Collaboration Special!!
(2013)
Usopp (voice)
One Piece Film Red
(2022)
Usopp (voice)
One Piece: Episode of Skypiea
(2018)
Usopp (voice)
Kiki's Delivery Service
(1989)
Tombo (voice)
One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends
(2014)
Usopp (voice)
Detective Conan: Magician of the Silver Sky
(2004)
Kaito Kid / Shinichi Kudou (voice)
Detective Conan: Black Iron Submarine
(2023)
Shinichi Kudou (voice)
Case Closed: The Million-Dollar Pentagram
(2024)
Kaito Kid / Shinichi Kudou (voice)
One Piece Film: GOLD
(2016)
Usopp (voice)
One Piece: Adventure of Nebulandia
(2015)
Usopp (voice)
One Piece: Baron Omatsuri and the Secret Island
(2005)
Usopp (voice)
Detective Conan: Captured in Her Eyes
(2000)
Shinichi Kudo (voice)
One Piece: The Movie
(2000)
Usopp (voice)
Detective Conan: Jolly Roger in the Deep Azure
(2007)
Shin'ichi Kudo (voice)
Inuyasha the Movie: Affections Touching Across Time
(2001)
Inuyasha
Ranma ½: The Movie 2 — The Battle of Togenkyo: Rescue the Brides!