Known for Acting

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.
1989
as Tombo (voice)
2000
as Usopp (voice)
2022
as Usopp (voice)
2023
as Shinichi Kudou (voice)
1999
as Shinichi Kudo / Kaito Kuroba (voice)
2025
as Shinichi Kudo (voice)
2007
as Usopp / Lashes (voice)
2024
as Kaito Kid / Shinichi Kudou (voice)
2012
as Usopp (voice)
2006
as Shinichi Kudo (voice) / Kaito Kuroba (voice)
2014
as Shinichi Kudo (voice)
2009
as Usopp (voice)
2016
as Usopp (voice)
1997
as Shinichi Kudo (voice)
2002
as Shinichi Kudo (voice)
2009
as Shinichi Kudo (voice)
2010
as Shinichi Kudo / Kaito Kid (voice)
2000
as Shinichi Kudo (voice)
2008
as Usopp (voice)
2015
as Teenage Jiromaru (voice)