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Kappei Yamaguchi (山口 勝平 Yamaguchi Kappei?, May 23, 1965)is a Japanese seiyū and actor from Fukuoka, affiliated with Gokū[1] 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?).[2] He made his first public appearance in North America at Otakon 2008;[3] and was also a guest at Sakura-Con 2009.[4][5] Yamaguchi's third appearance to date has been at Animazement in 2010.

He is married and has a son.[6]


Television animation


Film animation

Internet animation

  • Ikuze! Gen-san (2008, Genzō Tamura)[7]

Video games

  • Angel's Feather series (Shō Hamura)
  • Another Century's Episode: R (Tobia Arronax)
  • Battle Stadium D.O.N (Usopp)
  • Breath of Fire series (Ryū)
  • Crash Bandicoot series (Crash Bandicoot, Fake Crash, Wa-Wa the Water Elemental)
  • Destroy All Humans! (Cryptosporidium 137)
  • GetBackers Dakkanya: Uba Wareta Mugenshiro (Ginji Amano)
  • Harry Potter series (Harry Potter (as of Prizoner of Azkaban))
  • Grandia (Rapp)
  • Imagination Science World Gulliver Boy (Gulliver Toscanni)
  • InuYasha series (InuYasha)
  • Kannagi no Tori (Ryuu Watanuki)
  • L the Prologue to Death Note -Rasen no Trap- (L)
  • Legend of the Hungry Wolf series (Jin Chonshū, Jin Chonrei)
  • The Legend of Xanadu series (Arios)
  • Neo Angelique series (René)
  • Neo Geo Battle Coliseum (Jin Chonshū, Jin Chonrei)
  • One Piece series (Usopp)
  • Persona 4 (Kuma/Teddie)
  • Pokémon Mystery Dungeon: Time Exploration Team and Darkness Exploration Team (Hikozaru)
  • Ranma ½ series (Ranma Saotome)
  • Record of Lodoss War series (Eto)
  • SD Gundam G Generation Spirits (Tobia Arronax)
  • Super Robot Wars Alpha 2 (Tobia Arronax)
  • Tales of Rebirth (Tytree Crowe)
  • Tengai Makyō series (Danjūrō Kabuki)

Dubbing roles

  • Agent Cody Banks (Cody Banks)
  • Boy Meets World (Cory Matthews (seasons 3-7))
  • Charlie and the Chocolate Factory (television edition) (Mike Teavee)
  • Dragonball Evolution (Son Gokū)
  • Dr. Dolittle 2 (Archie the Bear)
  • Garfield: A Tail of Two Kitties (Garfield)
  • Growing Pains (Benjamin "Ben" Hubert Horatio Humphrey Seaver (seasons 5-7))
  • Indiana Jones and the Kingdom of the Crystal Skull (Henry "Mutt Williams" Jones III)
  • Looney Tunes (Bugs Bunny)
  • Space Jam (Bugs Bunny)
  • Madagascar (Mort)
  • Madagascar: Escape 2 Africa (Mort)
  • South Park (Kyle Broflovski, James "Jimmy" Vulmer, Craig Tucker, Clyde Donovan, Sixth Grade Leader, Dougie)
  • Star Trek: Deep Space Nine (Nog)
  • A Goofy Movie (Max Goof)
  • An Extremely Goofy Movie (Max Goof)
  • Disney's House of Mouse (Max Goof)


  • M&M's (Japanese) (Red M&M)

Anime music and audio dramas

Dialogue roles (dramas)

  • Akira Ijyuin - 20 Mensou Ni Onegai! (Man of Many Faces) (Victor, VICL-3001, 1990)
  • Yuuji Nonaka - Code Name wa Charmer a.k.a. My Codename is Charmer (Bandai/Apollon, BCCM-6, 1991) [8]
  • Ran - Sukisho
  • Artemis - Pretty Guardian Sailor Moon (live-action)
  • Saika - Pick of the Litter
  • Edward - Thomas the Tank Engine and Friends
  • Inuyasha - Inuyasha Jigoku de Matteita Shichinintai (Drama CD)

Singing roles

  • René - Neo Angelique ~My First Lady~ "Neo Angelique game booklet CD"
  • InuYasha - InuYasha character single "Aoki Yasei O Daite" released in December, 2005
  • Chichiri - Fushigi Yūgi "CD books"
  • Light - Twinbee Paradise 3 Vocal Bomb (Konami, KICA-7761) and Twinbee Paradise 2 Sound Fantasia (Konami KICA-7652)
  • Equal Striver (with Akio Matsuoka) - Shadow Skill V (Star Child, KICA-310, 1996)
  • Ranma Saotome (male) - Various Ranma ½ character songs released as singles (1989 - 1993)
  • Usopp - One Piece Character Song Albums and various singles.
  • Ryuichi Sakuma - Gravitation - Gravitation Sound Story III - Predilection
  • Hideyoshi Souya - Law of Ueki - The Law of Songs! - Hattari!
  • Frappi - Gambalance de Dance- Futari wa Pretty Cure Splash Star 2nd ED with Miyu Matsuki(as Choppi) and Mayumi Gojo [9]
  • Danny - "Boy..." (Konjiki no Gash Bell!! Character Song Series: Gash with Best Friends)
  • Sai Saici -with Argo Gulskii - Mobile Fighter G Gundam Character song: China Shuffle.

Other music CD albums


  • Rollin' (Futureland/Youmex, TYDY-5147, 1990)
  • A Boy (Futureland/Youmex, TYCY-5185, 1991)
  • Mini-Best (Meldac/Nippon Crown, MECH-18004, 1995)
  • Unbalance City (Nippon Columbia, COCC-13586, 1996)

With other seiyū

  • Message: Seiyū Collection Volume 1 (Platz, PLCA-808) (1990)

Radio Shows


  • Winner of the seiyū award in the 2003 Tokyo International Anime Fair


  • Yamaguchi's nick name is "saru", which means "monkey" in Japanese; translated into English, his personal web blog is titled: Monkey's Kingdom. Apparently this comes from his love for the monkey character in the classical Chinese story Journey to the West. He has actually voiced the monkey's role in an adaption of the original story, Monkey Typhoon and played the role in various stage adaptations.


External links

In English

In Japanese

ar:كابيه ياماغتشي ca:Kappei Yamaguchi ko:야마구치 갓페이 id:Kappei Yamaguchi it:Kappei Yamaguchi ru:Ямагути, Каппэй fi:Kappei Yamaguchi tl:Kappei Yamaguchi vi:Yamaguchi Kappei zh:山口勝平