Yamadera Kouichi roles
Anime
Kouichi has done the following roles in anime.
| Aa Megami-sama Sorezore no Tsubasa [2006] | Troubador |
| Adventure in the Otaku Galaxy | guy |
| Alexander Senki/Reign | Darius III |
| Anpan-man | Cheese |
| Anpan-man | Kabao |
| Ariel | Demonova |
| Armor Hunter Mellowlink | Bolf |
| Assemble Insert | Man 3 |
| Bakuen Campus Guardress | Chiryuu |
| Bakumatsu Kikansetsu Irohanihoheto | Sakamoto Ryouma |
| Battle Athletess Dai Undoukai | announcer |
| Borgman | Dust Jead |
| Borgman | Narrator |
| Borgman {Lover's Rain} | Thunder |
| Borgman 2 | Youma Master |
| Bosco Adventure [debut] | Otter |
| Bubble Gum Crisis {Episode 5,7,8} | Falgo |
| Captain Herlock: Outside Legend-The Endless Odyssey | "Herlock" |
| Compiler | Igarashi Nachi |
| Cowboy Bebop | Spike Spiegel |
| Danasite 999.9 | Captain Harlock |
| Dancougar | Abel |
| Dark Side Blues | Enji |
| Detonator Orgun | Shindo Tomoru/Orgun |
| Dokkiri Doctor | Nishikikoji Haruka |
| Donkey Kong | Donkey Kong |
| Evangelion | Kaji Ryouji |
| Fam and Ihrie | Migel |
| Five Star Stories | Man B |
| Geobreeders | Irie |
| Ghost in the Shell: Stand Alone Complex | Togusa |
| Gokuu Midnight Eye | Medical Examiner |
| Granzort | Shaman |
| Gundam Char's Counterattack | Gyunei Guss |
| Guy | Guy |
| Guyver [1989] | Zelbubuth |
| Hakkenden OAV [1990-1991] | Inuyama Dousetsu |
| Harlock Saga: The Ring of the Nibelung [1999] | Captain Harlock |
| Harlock Saga: The Ring of the Nibelung [1999] | Tochirou |
| Hidamari no Ki [2000] | Tezuka Ryouan |
| High School Agent | principal |
| Idol Boueitai Hummingbird | Yajima |
| Idol Tenshi Youkoso Yoko {Episode 5} | Claude |
| Idol Tenshi Youkoso Yoko {Episode 26} | Daiichi |
| Ishura [2024] | Shalk |
| Juubei Ninpouchou (Ninja Scroll) | Kibagami Juubei |
| Kakugo no Susume (Apocalypse Zero) | Hagakure Kakugo |
| Kimagure Orange Road [1987-1988] {movie} | Lecturer |
| Koukaku Kidoutai | Togusa |
| Kyattou Ninden Teyandee | Karamaru |
| Layton Kyouju to Eien no Utahime [2009] | Pierre Starbuck |
| Leina | Velt Zarik |
| Lupin III Part 6 [2021] | Zenigata Kouichi |
| Machine Robo | Drill Crusher |
| Megazone 23 {part I} | Nakagawa Shinji |
| Megazone 23 {part III} | Shion |
| Megumi | Yokota Shigeru |
| Mermaid's Forest (Ningyo no Mori) Takahashi Rumiko Gekijo Season 2 | Yuuta |
| Millenium Actress | man with the key |
| MIROKU | Hattori Hanzou/Navigator |
| Moonlight Pierce Yumemi & Silver Rose Knights [1991] | Demon Prince |
| Nanatoshi Monogatari [1994] | Almaric Asvale |
| Nineteen [1990] | Kawahara Kazuya |
| Ningyo no Mori | Yuta |
| Oedo ha Nemuranai! | Kikunosuke |
| Oishinbo {Episode 1} | employee E |
| Orguss 02 | Manning |
| OZ | Ordis |
| Photon | Papachariino |
| Pocket Monsters {Cerebi Toki wo Koeta Deai} | ? |
| Pocket Monsters Maboroshi no Pokemon Lugia Bakutan [1999] | Lugia |
| Ranma 1/2 [1989-1992] | Hibiki Ryouga |
| Ranma 1/2 [1989-1992] | Jusenkyou Guide |
| Run! Meros | Meros |
| Sakura Taisen The Movie [2001] | Brent Furlong |
| Shamanic Princess | Kagetsu |
| Shin Megami Tensei | Takehiko |
| Shouwa Genroku Rakugo Shinjuu Sukeroku Futatabihen [2017] | Sukeroku |
| Shurato | Ryuu-Oh Rouma |
| Shuumatsu no Izetta [2016] | Otto |
| Silent Mobius (movie) [1991-1992] {volume 2} | Aida Nachi |
| Sol Bianca (1999) | Sancho |
| Sore Ike! Anpan-man Dokin-chan no Doki Doki Calendar | Cheese |
| Sore Ike! Anpan-man Tsumiki-jou no Himitsu | Cheese |
| Sore Ike! Anpan-man Tsumiki-jou no Himitsu | Garangara |
| Souten no ken | ? |
| Sword Art Online [2012] | Kayaba Akihiko |
| Teito Monogatari | Narutaki Junichi |
| Tokumu Sentai Shinesman | Yamadera Shogo/Shinesman Grey |
| Tokyo Babylon | Yamagawa |
| Vampire Hunter The Animated Series | Zabel |
| Venus Senki | Jeff |
| Wataru | Kurama |
| Wild 7 | Happyaku |
| X (movie) [1996] | Arisugawa Sorata |
| Xenosaga: The Animation [2015] | Albedo |
| Xenosaga: The Animation [2015] | Guinan Kukai |
| Yousei Hime Rain | Takarada Gou |
| Youseiki Suikoden | Hamura Ryou |
| Yumemakura Baku Twilight Gekijou [1991] | Mibu |
| Yuugen Kaisha (Phantom Quest Corps) | Karino Kouzou |
Games
Kouichi has done the following roles in games.
| Capcom vs SNK 2 E.O. -Mark of the Millenaire 2001- [GameCube, PS2, Xbox] | Guile |
| Capcom vs SNK 2 E.O. -Mark of the Millenaire 2001- [GameCube, PS2, Xbox] | Mike Bison |
| Detonator Orgun [MegaCD] | Masamichi Tomol |
| Eva to Yukai na Nakama tachi [Playstation] | Kaji |
| Eva to Yukai na Nakama tachi [Playstation] | Smith |
| Evangelion Koutetsu no Girlfriend [Playstation, Sega Saturn] | Ryouji |
| Ganbare Goemon [Nintendo 64] | ? |
| Harry Potter to Himitsu no Heya [Playstation2] | ? |
| Ranma 1/2 [PC Engine] | Hibiki Ryouga |
| Ranma 1/2 Battle Renaissance [Playstation] | Hibiki Ryouga |
| Ranma 1/2 Byakuran Aika [MegaCD] | Hibiki Ryouga |
| Ranma 1/2 Datou, Ganso Musabetsu Kakutouryuu! [PC Engine] | Hibiki Ryouga |
| Ranma 1/2 Torawareno Hanayome [PC Engine] | Hibiki Ryouga |
| Shiritsu Justice Gakuen [PlayStation] | Kazama Daigo |
| Street Fighter Zero 3 [] | Cody |
| Tactical Fighter [Sega Saturn] | Dugal |
| Tales of Destiny [PlayStation] | Johnny Shiden |
| Uchuu Senkan Yamato Harukanaru Hoshi Iskandar [Playstation] | Kodai Susumu |
Drama
Kouichi has done the following roles in audio drama.
| Aa Megami-sama Tokuten Ou [CD] | Troubador |
| Bouken Radio Movie [CD] | Enjouji Tatsuma |
| Combination [CD] | Hashiba Shigemitsu |
| Fam & Ihrlie [CD] | Migel |
| Izumi Gensenki -Meidouhen- [CD] | Kisaragi Shirou |
| Outo Ayakashi Kitan [CD] | Fujiwara Masayuki |
| Photon [CD] | Papachariino |
| Sokkou Seitokai [CD] | Ohtani Kouichi |