Yamaguchi Kappei roles
Anime
Kappei has done the following roles in anime.
| 1+2 = Paradise | Yamamoto Yuusuke |
| Akachan to Boku | Takuya |
| Akihabara Dennou Gumi [1998] | White Prince |
| Angelic Layer [2001] | Misaki Ryou |
| Apfel Land Story | Virgil |
| Arslan Senki | Arslan |
| Ashita he no Free Kick | Toto |
| Ayane-chan High Kick | Inagaki Kappei |
| B'T X | Kimiira |
| Battle Angel | Yugo |
| Beast Wars | Rattor |
| Betterman | Aono Keita |
| Boyfriend | Tohru |
| Bronze | Shibuya |
| Captain Tsubasa [1983-1986] | Shester |
| CB Character Nagai Gou World | Kabuto Kouji |
| Chibineko Tom no daibouken -Chikyuu wo sukue! Nakamatachi [2014] | Michael |
| CLAMP Gakuen Tanteidan | Higashikumaru Kentaro |
| Claymore [2007] | male awakened 3 |
| Cowboy Bebop {Episode 10} | Rhint |
| D.C. II -Da Capo II- [2007] | Itabashi Wataru |
| Dagwon | Utsumi Rai |
| Dash! Shikurou | Sento |
| DearS [2004] | Oikawa Hiroko |
| Death Note | L |
| Dororon Enma-kun Meeramera [2011] | Enma-kun |
| Dragon Slayer | Serios |
| Edens Bowy | Yorun |
| Fire Emblem | Julian |
| Flag! | Akira |
| Flare 2 | Io |
| Futari ha Pre Cure Splash Star | Frappi |
| G Gundam | Sai Saishi |
| Gekijouban Yuu+Gi+Ou [Yuugiou] -Chouyuugou! Toki wo Koeta Kizuna- [2010] | Daitokuji |
| Geneshaft | Jean Godot |
| Giant Robo | Kusamu Daisaku |
| Ginga Sengoku Gun'yuuden Rai | Taisuke |
| Gokinjo Monogatari [1995-1996] | Yamaguchi Tsutomu |
| Gravitation [2000-2001] | Sakuma Ryuuichi |
| Gulliver Boy | Guliver |
| Gun Frontier | Tochirou |
| Gunnm | Hugo |
| Hakkenden OAV [1990-1991] | Inukawa Sosuke (Gakuzo) |
| Hanappe Bazooka | Hanappe |
| Houma Hunter Lime | Birth |
| Idol Tenshi Youkoso Yoko | Yasu-san |
| Inuyasha [2000] | Inuyasha |
| Jungle de Ikou | Takuma |
| Jungle Emperor | Kesor? |
| Juuni Kokki [2002] | Enki Rokuta |
| Kamikaze Kaitou Jeanne [1999-2000] | Noin |
| Kindaichi Shounen no Jikenbo | Misumi Youhei |
| Kindaichi Shounen no Jikenbo Operazakan Aratanaru Satsujin | Kindaichi Hajime |
| King of Jungle Tar-chan | Etekichi |
| Kishin Heidan [1993-1994] {volume 4} | captain |
| KO Seiki Beast Sanjuushi [1992] | Wan Dabada |
| Koisento [2010] | Shiroi Shika |
| Kyattou Ninden Teyandee | Yattarou |
| Kyoukai no Rinne [2015-2017] | Rokudou Sabato |
| Madara | Madara |
| Mahou no Stage Fancy Lala [1998] | Yoshida Tarou |
| Mahoujin Guru Guru [1994-1995] | Prince Nikomo |
| Majo no Takkyuubin (Kiki's Delivery Service) | Tombo |
| Mama ha Shougaku 4 Nensei | Hanada Hideo |
| Mamono Hunter Yohko | Osamu Wakabayashi |
| Meitantei Conan (Detective Conan) | Kudou Shin'ichi |
| Miracle Girls | Noda Yuuya |
| Mouse [2003] | Mouse |
| Nineteen [1990] | Kubota's friend |
| Nintama Rantarou | Hanafusa Makinosuke |
| Oira Sukeban [Delinquent in Drag] | Suke Banji |
| One Piece [1999-] | Usoppu |
| Osakana ha Ami no Naka | Matsui |
| Peace Maker Kurogane [2003-2004] | Nagakura Shinpachi |
| Persona 4 [2011-2012] | Kuma |
| Persona 4 The Golden [2014] | Kuma |
| Plastic Little | Nichol |
| Please Save My Earth | Kasama Haruhiko |
| Ranma 1/2 [1989-1992] [debut] | Saotome Ranma |
| Record of Lodoss War | Etoh |
| Reideen [1996] | Kyle Moon |
| RG VEDA | Ryuu-Oh |
| Rizelmine | Iwata Tomonori |
| Rurouni Kenshin -Meiji Kenkaku Romantan- {Ishinshishi he no Requiem} | Musashino Yasuharu |
| Ryokunohara Labyrinth | Kanata |
| Saber Marionette J to X {Episode 6} | Shikase Akashi |
| Seishoujo Kantai Virgin Fleet | Diesel's employee |
| Sensei no Ojikan [2004] | Suetake Kenta |
| Shadow Skill | Low |
| Shouwa Genroku Rakugo Shinjuu Sukeroku Futatabihen [2017] | Amaken |
| Silent Mobius (TV) [1998] | Flex |
| Sister Princess [2001] {episode 1} | Yamada Taro |
| Slow Step | Akiba Shuu |
| Souryuuden | Ryuudou Amaru |
| Super Zugan | Toyotomi |
| Takahashi Rumiko Gekijou [2003] {Ep.2} | Bettou |
| Takahashi Rumiko Gekijou [2003] {Ep.3} | Furuta Minoru |
| Takahashi Rumiko Gekijou [2003] {Ep. 5} | Aizaki-senpai |
| Takamaru | Fukuda Clorde |
| Tanken Driland [2012] | Diagar |
| Tenkuu no Escaflowne | Shesta |
| Tokyo Babylon | Sumeragi Subaru |
| Toriko [2011-2013] {Episode 99} | Usop |
| TOTTOI | Billia |
| Twinbee Paradise | Light |
| Villgust | Bostov |
| Violence Jack | Inuma Saurou |
| Wedding Peach | Takurou |
| Wind Named Amnesia [1990] | Johnny |
| YAT Anshin! Uchuu Ryokou 2 [1998] | Kanabi |
| YAT Anshin! Uchuu Ryokou [1996-1997] | Kanabi |
| Zenki | little Zenki |
| Zetsuai 1989 | Katsumi Shibuya |
| Zoku Zoku Mura no Obaketachi | Ninniku |
| Zoku Zoku Mura no Obaketachi {2} | Passari |
Games
Kappei has done the following roles in games.
| Breath of Fire III | Rei |
| Der Langrisser [PC FX] | Hein |
| Friends Seishun no Kagayaki [Sega Saturn] | Kurakake Fujio |
| Grandia [Sega Saturn] | Rap |
| Harukaze Sentai V Force [Playstation] | Ikuto |
| Houma Hunter Lime Perfect Collection [Sega Saturn] | Birth |
| Kidou Senshi Gundam Climax U.C. [PlayStation 2] | Tobia |
| Langrisser I and II [Playstation] | Hein |
| Misa no Mahou Monogatari [Playstation] | Firim |
| Persona 4 [PlayStation 2] | Kuma |
| Ranma 1/2 [PC Engine] | Saotome Ranma |
| Ranma 1/2 Battle Renaissance [Playstation] | Saotome Ranma |
| Ranma 1/2 Byakuran Aika [MegaCD] | Saotome Ranma |
| Ranma 1/2 Datou, Ganso Musabetsu Kakutouryuu! [PC Engine] | Saotome Ranma |
| Ranma 1/2 Torawareno Hanayome [PC Engine] | Saotome Ranma |
| Real Bout Garou Densetsu [Arcade, Neo Geo] | Jin Chonrei |
| SF Androgal [Windows] | Ringo |
| Shin Fortune Quest [Playstation] | Trap |
| Super Robot Taisen Original Generations [PlayStation 2] | Task |
| Tengai Makyou Shinden/Kabuki Klash [Arcade, Neo Geo] | Kabuki Danjuro |
| Triangle Again [PlayStation 2, Xbox] | ? |
Drama
Kappei has done the following roles in audio drama.
| Aa Megami-sama [CD] | Morisato Keiichi |
| Beast of East [CD] | ? |
| Fortune Quest Gaiden [CD] | Trap |
| God Save The Sugekomakun! Ultra soushingeki!! Sugekoma daisassen!? [CD] | Sugekoma Sugekoma |
| Hourai Gakuen no Hatsukoi! [CD] | Asahina Jun'ichi |
| Jungle de Ikou [CD] | Takuma |
| Kyuukyoku Parodius [CD] | Aitsu |
| Princess Quest [CD] | Gateau |
| RG Veda -Kyoujou Engoku hen- [CD] | Ryuu-ou |
| Rockman [CD] | Robo 1 |
| Shadow Skill [CD] | Low |
| Twinbee Paradise [CD] | Light |
