
Notable roles by Kappei Yamaguchi:
- Artemis in the live-action Sailor Moon
- Current Japanese voice actor for Bugs Bunny.
- Cheshire Cat from Pandora Hearts
- The eponymous character of Crash Bandicoot (darrin'd by Makoto Ishii)
- Daitokuji/Amnael in Yu-Gi-Oh! GX
- Enma-kun in Dororon Enma-kun Meera Mera
- Feitan in Hunter × Hunter (2011 version)
- Flappy in Futari Wa Pretty Cure Splash Star
- Gulliver Toscani in Gulliver Boy
- Haruhiko in Please Save My Earth
- Hideyoshi Soya from The Law of Ueki
- Hifumi Yamada in Dangan Ronpa
- Hikozaru/Chimchar from Pokémon Mystery Dungeon
- Illusion in Doubutsu Sentai Zyuohger
- Inuyasha from InuYasha
- Jetfire, one half of Safeguard, and Rattletrap in the Japanese dub of Transformers Animated
- Jin Chonrei & Jin Chonshu from Fatal Fury
- Kabuki Danjuro in Tengai Makyou.
- Kerokichi in Yaiba
- Kuma/Teddie from Persona 4
- Kusama Daisaku in Giant Robo
- Kyle, Jimmy, Craig and some other roles in the Japanese Dub of South Park
- L from Death Note
- Light in Twinbee
- Mizuki Akabayashi in Durarara!!
- Nagakura Shinpachi in Peacemaker Kurogane
- Noin Claude from Kamikaze Kaitou Jeanne
- Older Heart in You Are Umasou
- Phillip in Ni no Kuni
- Rai Utsumi from Brave Command Dagwon
- Ranma Saotome from Ranma ½ (debut role)
- Rattrap in the Japanese dub of Beast Wars and Beast Machines
- Rapp in Grandia.
- The Red M&M in the Japanese M&M commercials
- Ryu in Breath of Fire III, IV, Dragon Quarter and 6
- Ryu-ou in RG Veda
- Ryuichi Sakuma in Gravitation
- Sai Saici from G Gundam and Super Robot Wars
- Tobia Arronax from the Mobile Suit Crossbone Gundam series of manga in his many video game appearances.
- Sena Izumi in Weiß Kreuz Gluhen.
- Shigekiyo "Shigechi" Yangu in JoJo's Bizarre Adventure
- Shinichi Kudo and Kaito Kid from Detective Conan
- Sabato Rokudo in Rinne.
- Snips in the Japanese dub of My Little Pony: Friendship Is Magic
- Son Goku (Justin Chatwin) in the Japanese dub of Dragonball Evolution.
- Sonic the Hedgehog in the Japanese dub of Adventures of Sonic the Hedgehog and Sonic SatAM.
- Q-N-C from Sonic Boom (AKA Sonic Toon in Japanese)
- Takuma in Jungle de Ikou!
- Taro Yoshida from Magical Stage Fancy Lala
- Tarou "Monta" Raimon from Eyeshield 21
- Tasuku Shinhuji from the Super Robot Wars Original Generation series
- Tetsuya Naito in Tiger Mask W
- Tick Jefferson from Baccano!!
- Ticket from Ressha Sentai Tokkyuger, as well as the voice of the Tokkyugers' gear.
- Tombo from Kiki's Delivery Service
- Tytree Crowe from Tales of Rebirth
- Usopp from One Piece
- Walder from Granblue Fantasy
- Wanda from Miracle Wanda
- Yattarou (AKA: "Speedy Cerviche") from Kyattou Ninden Teyandee (better known to North American viewers through its Gag Dub Samurai Pizza Cats)
- Zenki (child mode) in Kishin Douji Zenki