Kappei Yamaguchi
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Roles are weighted by involvement: director 1.0, screenwriter 0.7, lead 0.8, supporting 0.4, crew 0.1.
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.
Known for
Credits
Kiki's Delivery Service (1989)
as Tombo (voice)
Assassination Classroom the Movie: Our Time (2026)
as Futoshi (voice)
One Piece Film Red (2022)
as Usopp (voice)
One Piece Film: Strong World (2009)
as Usopp (voice)
Detective Conan: One-Eyed Flashback (2025)
as Shinichi Kudo (voice)
One Piece Film: Z (2012)
as Usopp (voice)
Detective Conan: The Phantom of Baker Street (2002)
as Shinichi Kudo (voice)
One Piece Film: GOLD (2016)
as Usopp (voice)
Lupin the Third vs. Detective Conan: The Movie (2013)
as Shinichi Kudo / Kaito Kuroba (voice)
Detective Conan: The Million-Dollar Pentagram (2024)
as Kaito Kid / Shinichi Kudou (voice)
Detective Conan: Black Iron Submarine (2023)
as Shinichi Kudou (voice)
Detective Conan: Quarter of Silence (2011)
as Shinichi Kudo (voice)
Case Closed: The Fourteenth Target (1998)
as Shinichi Kudo (voice)
Death Note Relight 1: Visions of a God (2007)
as L (voice)
Detective Conan: Episode One - The Great Detective Turned Small (2017)
as Shinichi Kudo (voice)
Detective Conan: Captured in Her Eyes (2000)
as Shinichi Kudo (voice)
Detective Conan: The Time Bombed Skyscraper (1997)
as Shinichi Kudo (voice)
The Boy and the Beast (2015)
as Teenage Jiromaru (voice)
Detective Conan: Crossroad in the Ancient Capital (2003)
as Shinichi Kudo (voice)
One Piece: Baron Omatsuri and the Secret Island (2005)
as Usopp (voice)
Gintama the Movie 2026: Yoshiwara in Flames (2026)
as Inorin (voice)
Mazinger Z: Infinity (2017)
as Mucha (voice)
Detective Conan: Sunflowers of Inferno (2015)
as Shinichi Kudo / Kaitou Kid (voice)
Detective Conan: The Last Wizard of the Century (1999)
as Shinichi Kudo / Kaito Kuroba (voice)
One Piece: The Movie (2000)
as Usopp (voice)
Detective Conan: Dimensional Sniper (2014)
as Shinichi Kudo (voice)
Detective Conan: The Eleventh Striker (2012)
as Shinichi Kudo (voice)
Case Closed: Countdown to Heaven (2001)
as Shinichi Kudo (voice)
Detective Conan: The Raven Chaser (2009)
as Shinichi Kudo (voice)
Detective Conan: The Private Eyes' Requiem (2006)
as Shinichi Kudo (voice) / Kaito Kuroba (voice)
Detective Conan: Magician of the Silver Sky (2004)
as Kaito Kid / Shinichi Kudou (voice)
Detective Conan: The Scarlet Bullet (2021)
as Shinichi Kudo (voice)
Escaflowne: The Movie (2000)
as Shesta (voice)
One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014)
as Usopp (voice)
Detective Conan: The Lost Ship in the Sky (2010)
as Shinichi Kudo / Kaito Kid (voice)
Detective Conan: Jolly Roger in the Deep Azure (2007)
as Shin'ichi Kudo (voice)
One Piece: Episode of Skypiea (2018)
as Usopp (voice)
Dream 9 Toriko x One Piece x Dragon Ball Z Super Collaboration Special!! (2013)
as Usopp (voice)
Detective Conan: Private Eye in the Distant Sea (2013)
as Shinichi Kudo (voice)
Case Closed: The Crimson Love Letter (2017)
as Shinichi Kudo (voice)
Detective Conan: The Darkest Nightmare (2016)
as Shinichi Kudo (voice)
Detective Conan: Strategy Above the Depths (2005)
as Shinichi Kudou (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine (1992)
as Ranma Saotome ♂ (voice)
Luffy's Fall! The Unexplored Region - Grand Adventure in the Ocean's Navel (2000)
as Usopp (voice)
One Piece 3D: Gekisou! Trap Coaster (2011)
as Usopp (voice)
Detective Conan: The Bride of Halloween (2022)
as Shinichi Kudo (voice)
Detective Conan: Full Score of Fear (2008)
as Shinichi Kudo (voice)
One Piece: Dream Soccer King! (2002)
as Usopp (voice)
Alice in Wonderland –Dive in Wonderland– (2025)
as The White Rabit (voice)
Inuyasha the Movie: Affections Touching Across Time (2001)
as Inuyasha (voice)
Detective Conan: The Story of Ai Haibara: Black Iron Mystery Train (2023)
as Kaito Kuroba (voice)
One Piece: Giant Mecha Soldier of Karakuri Castle (2006)
as Usopp (voice)
One Piece Mugiwara Chase (2011)
as Usopp (voice)
One Piece Episode of Alabasta Prologue (2011)
as Usopp (voice)
Detective Conan: The Disappearance of Conan Edogawa - The Worst Two Days in History (2015)
as Shinichi Kudo (voice)
Hunter x Hunter: Phantom Rouge (2013)
as Feitan (voice)
One Piece: Curse of the Sacred Sword (2004)
as Usopp (voice)
One Piece: Clockwork Island Adventure (2001)
as Usopp (voice)
Lupin the Third vs. Detective Conan (2009)
as Shinichi Kudo (voice)
Death Note Relight 2: L's Successors (2009)
as L (voice)
One Piece: The Desert Princess and the Pirates: Adventure in Alabasta (2007)
as Usopp / Lashes (voice)
One Piece: Stampede (2019)
as Usopp (voice)
Detective Conan vs. Kid the Phantom Thief (2024)
as Kaito Kuroba / Kaito Kid (voice)
Inuyasha the Movie 3: Swords of an Honorable Ruler (2003)
as Inuyasha (voice)
Inuyasha the Movie 4: Fire on the Mystic Island (2004)
as Inuyasha (voice)
One Piece: Jango's Dance Carnival (2001)
as Usopp (voice)
One Piece: Adventure of Nebulandia (2015)
as Usopp (voice)
Samurai X: The Motion Picture (1997)
as Yasuharu Musashino
One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream! (2003)
as Usopp (voice)
One Piece: Dead End Adventure (2003)
as Usopp (voice)
One Piece: Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom (2008)
as Usopp (voice)
Inuyasha the Movie 2: The Castle Beyond the Looking Glass (2002)
as Inuyasha (voice)
One Piece: Heart of Gold (2016)
as Usopp (voice)
One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends (2012)
as Usopp (voice)
One Piece: Chopper's Kingdom on the Island of Strange Animals (2002)
as Usopp (voice)
Detective Conan: The Scarlet School Trip (2019)
as Shinichi Kudo (voice)
Ranma 1/2: Team Ranma vs. the Legendary Phoenix (1994)
as Ranma Saotome ♂ (voice)
TIGER & BUNNY: The Beginning (2012)
as Robin Baxter (voice)
Blue Memories: Boys, Colonizing Manchuria and Mongolia (1993)
as Kyota Suzuki (voice)
Battle Angel (1993)
as Yūgo (voice)
Urotsukidōji II: Legend of the Demon Womb (1991)
as Young Munchausen II (voice)
Animal Crossing: The Movie (2006)
as Fûta (voice)
Case Closed: Zero the Enforcer (2018)
as Shinichi Kudo / Kaito Kid (voice)
Plastic Little: The Adventures of Captain Tita (1994)
as Nicole (voice)
Yu-Gi-Oh! Bonds Beyond Time (2010)
as Daitokuji (voice)
One Piece: Glorious Island (2012)
as Usopp (voice)
One Piece: Episode of Luffy - Hand Island Adventure (2012)
as Usopp (voice)
Ressha Sentai ToQger vs. Kyoryuger: The Movie (2015)
as Ticket (voice)
ODDTAXI in the Woods (2022)
as Eiji Kakihana (voice)
One Piece Episode of East Blue (2017)
as Usopp (voice)
One Piece Film Gold: Episode 0 (2016)
as Usopp (voice)
Asura (2012)
Actor
Ranma 1/2 the Movie: Big Trouble in Nekonron, China (1991)
as Ranma Saotome ♂ (voice)
Zyuden Sentai Kyoryuger vs. Go-Busters: The Great Dinosaur War (2014)
as ToQger equipment (voice)
A Wind Named Amnesia (1990)
as Johnny (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014)
as ToQger Equipment Voice
Hanappe Bazooka (1992)
as Hanahei Yamada (voice)
Urusei Yatsura: The Obstacle Course Swim Meet, It's a Rumic World: Urusei Yatsura (2008)
as (voice)
Baby Felix & Friends (2000)
as Poindexter
Ressha Sentai ToQger vs. Kamen Rider Gaim: Spring Break Combined Special (2014)
as Ticket / ToQger Equipment (voice)
One Piece Episode of Merry: The Tale of One More Friend (2013)
as Usopp (voice)
Shadow Skill: The Movie (1996)
as Scrib Lowengren
Pretty Guardian Sailor Moon: Act Zero (2005)
Actor
Peacemaker Kurogane: Belief (2018)
as Shinpachi Nagakura (voice)
One Piece Episode of Sabo: The Three Brothers' Bond - The Miraculous Reunion and the Inherited Will (2015)
as Usopp (voice)
The Adventures of Tyrano Boy (2015)
as Zesta (voice)
Kindaichi Case Files : The Opera House Murders (1996)
as Hajime Kindaichi (Voice)
Persona4 the ANIMATION -The Factor of Hope (2012)
as Kuma (voice)
Atashin'chi: The 3D Movie (2010)
as Fujino (voice)
One Piece Special: The Detective Memoirs of Chief Straw Hat Luffy (2005)
as Usopp (voice)
Netrun-mon the Movie (2004)
as BB Runner
One Piece: Romance Dawn Story (2008)
as Usopp (voice)
Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World (2011)
as Flappy
Inferious Interplanetary War Chronicle - Condition Green (1991)
as Oscar Cloud (voice)
Kishin Douji Zenki Gaiden: Anki Kitan (1997)
as Zenki
Pretty Cure All Stars DX: Everyone Is a Friend - A Miracle All Pretty Cures Together (2009)
as Flappy (voice)
Heart and Yummie (2010)
as Heart (voice)
Dead Leaves (2004)
as Retro (voice)
Pretty Cure All Stars New Stage: Friends of the Future (2012)
as Flappy
Detective Conan: The 17-Year-Old Truth (2025)
as Shinichi Kudo (voice)
Grappler Baki: The Ultimate Fighter (1994)
as Baki Hanma
Giant Robo: The Day the Earth Stood Still (1992)
as Daisaku Kusama
Case Closed: The Fist of Blue Sapphire (2019)
as Shinichi Kudo / Kaito Kuroba (voice)
Nineteen 19 (1990)
as Hiroaki Kusano (voice)
Pretty Guardian Sailor Moon Special Act: We're Getting Married!！ (2004)
Actor
Nagasaki 1945 ~ The Angelus Bells (2005)
Actor
Camp Pikachu (2002)
as Barubeat (voice)
The Mighty Gin Rei (1994)
as Daisaku Kusama (voice)
Tottoi (1992)
as Billia (voice)
Futari wa Precure Splash☆Star the Movie: Tic-Tac Crisis Hanging by a Thin Thread! (2006)
as Flappy (voice)
Space Battleship Yamato Resurrection (2009)
as Ryohei Nakanishi (voice)
Pokémon: Pikachu's Rescue Adventure (1999)
as Parasect (voice)
Chibi Maruko-chan (1990)
as Kenichi Oono (voice)
One Piece: The Great Treasure of Tongari Island (2016)
as Usopp (voice)
Yona Yona Penguin (2009)
as Mulmul (voice)
Twinbee PARADISE (1998)
Actor
Pretty Cure All Stars DX2: The Light of Hope - Protect the Rainbow Jewel! (2010)
as Flappy (voice)
Serena x One Piece: Sennyuu!! Sauzando Sunny-gou (2011)
as Usopp (voice)
Ultraman Super Fighter Legend (1996)
as Astra / Announcer Banjou (voice)
A Tree of Palme (2002)
as Roualt (voice)
Dragon Knight: Wheel of Time (1998)
as Kakeru
One Piece Special: Protect! The Last Great Stage (2003)
as Usopp (voice)
Bonobono: Secret of the Kumomo Tree (2002)
as Araiguma-kun
Ranma ½: Nightmare! Incense of Spring Sleep (2008)
as Ranma Saotome ♂ (voice)
Detective Conan: Black History (2007)
Actor
Madara (1991)
as (voice)
Butt Attack Punisher Girl Gautaman: The Birth of Gautaman (1994)
as Shibuya (voice)
Tokyo Babylon 1 (1992)
as Subaru Sumeragi
Stage Play 「Spooky Kitaro」 (2025)
Actor
Coicent (2010)
as White Deer (voice)
Crows (1994)
Actor
Trusty Ginjiro (1991)
as Ginjiro Yamazaki (voice)
Ressha Sentai ToQger The Movie: Galaxy Line S.O.S. (2014)
as Ticket / ToQger Equipment / Narrator (voice)
Devil Hunter Yohko (1990)
Actor
Super Sentai Strongest Battle Director's Cut (2019)
as ToQger Arsenal (voice)
Chibi Maruko-chan: My Favorite Song (1992)
as Kenichi Oono (voice)
Dragon Quest - Emblem of Roto (1996)
Actor
Barefoot Gin Rei (1994)
as Daisaku Kusama (voice)
Eternal Family (1997)
as Sasuke (voice)
One Piece - En route vers l'épisode 1000 (2021)
as Comédien de doublage de Usopp – Japon
The Heroic Legend of Arslan (1991)
Actor
The Heroic Legend of Arslan II (1992)
Actor
Pokémon Mystery Dungeon: Explorers of Time & Darkness (2007)
as Chimchar (voice)
Bronze: Zetsuai Since 1989 (1996)
as Shibuya (voice)
Samurider: Nazo no Tenkousei (1991)
as 山口
Mouse Story: The Adventures of George and Gerald (2007)
as Chamberlain
Shuriken Sentai Ninninger vs. ToQger the Movie: Ninjas in Wonderland (2016)
as Ticket (voice), ToQger Equipment Voice
Futari wa Precure Splash☆Star: Maji Doki Theater (2006)
as Flappy (voice)
Neighborhood Story The Movie (1996)
as Tsutomu Yamaguchi (voice)
Gosho Aoyama’s Collection of Short Stories (1999)
Actor
Violence Jack: Hell's Wind (1990)
as Saburo Tenma
Delinquent in Drag (1992)
as Suke Banji (voice)
Shadow Skill: Epilogue (1995)
as Scrib Lowengren (voice)
Pichu & Pikachu's Winter Vacation 2001 (2000)
as Delibird (voice)
Magical Circle Guru Guru (1996)
Actor
Kamiwaza Wanda (2017)
Actor
Ressha Sentai ToQger Returns: Super ToQ #7 of Dreams (2015)
as Ticket (voice)
Noiseman Sound Insect (1997)
as Manabu (voice)
Tomcat's Big Adventure (2014)
as Michael (voice)
Bondage Queen Kate (1994)
as Dick (voice)
HANAKAPPA – Adventure in the Butterfly Kingdom (2013)
as Garizo (voice)
Virgin Fleet (1998)
as Sada
Ryokunohara Labyrinth - Sparkling Phantom (1990)
as Kanata Tokino
Butt Attack Punisher Girl Gautaman R: The Final Battle Between Love & Tragedy! (1994)
as Shibuya (voice)
One Piece: The Adventure in Grand Line (2002)
as Usopp (voice)
Engimon (2018)
Actor
VISUALIVE Persona 4 (2012)
as Kuma (voice)
Desperate Love 1989 (1992)
as Katsumi Shibuya (voice)
Detective Conan Magic File (2007)
Actor
Boyfriend (1992)
as Ougi (voice)
Welcome to Lodoss Island! (1998)
as Etoh (voice)
Ressha Sentai ToQger DVD Special: Farewell, Ticket! The Wasteland Super ToQ Battle! (2014)
as Ticket (voice)
Okaeri: Furusato no Karatsu (2017)
as Sora Hiroi (voice)
Tokyo Babylon 2 (1994)
as Subaru Sumeragi
Tomorrow Will Be Better! Half a Sweet Potato (2005)
Actor
Unification of Japan Gaiden: Yamazaki Family — Joji and His Merry Friends (2024)
Actor
It's a Rumic World: 50th Anniversary Weekly★Shonen Sunday (2008)
as Inuyasha / Ranma Saotome ♂ (voice)
K.O. Beast (1992)
Actor
My Dread is School! Kanako Inuki Shout Collection (1999)
as Bukita
Silent Mobius Gaiden: The End of the Edo Period (1993)
Actor
Conan vs. Kaito Kid (1997)
as Kaito Kid
ワンピース特別編 わかりやすいルフィ大百科 (2005)
as 乌索普
Appleland Story (1992)
as Virgil
Pa-Pa-Pa the Movie: Perman: Tako de Pon! Ashi wa Pon! (2004)
Actor
Ressha Sentai ToQger Final Live Tour 2015 (2015)
as Ticket / ToQger Equipment Voice (voice)
La Blue Girl: Climax Taizen (2002)
as Nin-Nin