
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 ½), 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.

JUJUTSU KAISEN
TV • 2020

Death Note
TV • 2006

JoJo's Bizarre Adventure
TV • 2012

Hunter x Hunter
TV • 2011

Ranma ½
TV • 1989

Ranma ½
TV • 1989

Rin-ne
TV • 2015

Powerpuff Girls Z
TV • 2006

One Piece
TV • 1999

Detective Conan
TV • 1996

Detective Conan
TV • 1996

Atashin'chi
TV • 2002

The Ancient Magus' Bride
TV • 2017

InuYasha
TV • 2000

Gravitation
TV • 2000

Urusei Yatsura
TV • 2022

Urusei Yatsura
TV • 2022

Urusei Yatsura
TV • 2022