Kappei Yamaguchi
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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)
One Piece Film Red (2022)
as Usopp (voice)
Assassination Classroom the Movie: Our Time (2026)
as Futoshi (voice)
Detective Conan: The Million-Dollar Pentagram (2024)
as Kaito Kid / Shinichi Kudou (voice)
Gintama the Movie 2026: Yoshiwara in Flames (2026)
as Inorin (voice)
One Piece Film: GOLD (2016)
as Usopp (voice)
One Piece Film: Z (2012)
as Usopp (voice)
Detective Conan: Quarter of Silence (2011)
as Shinichi Kudo (voice)
Detective Conan: The Counterfeit Case of Ultra 30 (2026)
as Shinichi Kudo (voice)
One Piece: Baron Omatsuri and the Secret Island (2005)
as Usopp (voice)
Detective Conan: One-Eyed Flashback (2025)
as Shinichi Kudo (voice)
Detective Conan: Black Iron Submarine (2023)
as Shinichi Kudou (voice)
One Piece Film: Strong World (2010)
as Usopp (voice)
Mazinger Z: Infinity (2017)
as Mucha (voice)
The Boy and the Beast (2015)
as Teenage Jiromaru (voice)
Death Note Relight 1: Visions of a God (2007)
as L (voice)
Lupin the Third vs. Detective Conan: The Movie (2013)
as Shinichi Kudo / Kaito Kuroba (voice)
Detective Conan: The Phantom of Baker Street (2002)
as Shinichi Kudo (voice)
Detective Conan: The Disappearance of Conan Edogawa - The Worst Two Days in History (2015)
as Shinichi Kudo (voice)
Detective Conan: The Time Bombed Skyscraper (1997)
as Shinichi Kudo (voice)
One Piece: Episode of Skypiea (2018)
as Usopp (voice)
One Piece Mugiwara Chase (2011)
as Usopp (voice)
Dream 9 Toriko x One Piece x Dragon Ball Z Super Collaboration Special!! (2013)
as Usopp (voice)
Detective Conan: Captured in Her Eyes (2000)
as Shinichi Kudo (voice)
Detective Conan: The Darkest Nightmare (2016)
as Shinichi Kudo (voice)
One Piece: The Movie (2000)
as Usopp (voice)
Detective Conan: Crossroad in the Ancient Capital (2003)
as Shinichi Kudo (voice)
One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends (2014)
as Usopp (voice)
Case Closed: The Fourteenth Target (1998)
as Shinichi Kudo (voice)
Detective Conan: The Eleventh Striker (2012)
as Shinichi Kudo (voice)
Case Closed: The Crimson Love Letter (2017)
as Shinichi Kudo (voice)
Detective Conan: Dimensional Sniper (2014)
as Shinichi Kudo (voice)
Detective Conan: The Private Eyes' Requiem (2006)
as Shinichi Kudo (voice) / Kaito Kuroba (voice)
Detective Conan: Sunflowers of Inferno (2015)
as Shinichi Kudo / Kaitou Kid (voice)
Detective Conan: Private Eye in the Distant Sea (2013)
as Shinichi Kudo (voice)
Detective Conan: Jolly Roger in the Deep Azure (2007)
as Shin'ichi Kudo (voice)
Detective Conan: The Scarlet Bullet (2021)
as Shinichi Kudo (voice)
Detective Conan: Full Score of Fear (2008)
as Shinichi Kudo (voice)
Detective Conan: The Bride of Halloween (2022)
as Shinichi Kudo (voice)
One Piece: Adventure of Nebulandia (2015)
as Usopp (voice)
Detective Conan: The Raven Chaser (2009)
as Shinichi Kudo (voice)
One Piece: Clockwork Island Adventure (2001)
as Usopp (voice)
Detective Conan: The Last Wizard of the Century (1999)
as Shinichi Kudo / Kaito Kuroba (voice)
Case Closed: Countdown to Heaven (2001)
as Shinichi Kudo (voice)
Detective Conan: The Lost Ship in the Sky (2010)
as Shinichi Kudo / Kaito Kid (voice)
Detective Conan: Strategy Above the Depths (2005)
as Shinichi Kudou (voice)
Detective Conan: Magician of the Silver Sky (2004)
as Kaito Kid / Shinichi Kudou (voice)
One Piece: Stampede (2019)
as Usopp (voice)
Detective Conan: The Story of Ai Haibara: Black Iron Mystery Train (2023)
as Kaito Kuroba (voice)
One Piece: The Desert Princess and the Pirates: Adventure in Alabasta (2007)
as Usopp / Lashes (voice)
Hunter x Hunter: Phantom Rouge (2013)
as Feitan (voice)
One Piece: Jango's Dance Carnival (2001)
as Usopp (voice)
One Piece: Chopper's Kingdom in the Strange Animal Island (2002)
as Usopp (voice)
Detective Conan: Episode One - The Great Detective Turned Small (2017)
as Shinichi Kudo (voice)
Inuyasha the Movie 2: The Castle Beyond the Looking Glass (2002)
as Inuyasha (voice)
One Piece: Curse of the Sacred Sword (2004)
as Usopp (voice)
Yu-Gi-Oh! Bonds Beyond Time (2010)
as Daitokuji (voice)
Death Note Relight 2: L's Successors (2009)
as L (voice)
Inuyasha the Movie: Affections Touching Across Time (2001)
as Inuyasha (voice)
One Piece: Giant Mecha Soldier of Karakuri Castle (2006)
as Usopp (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine (1992)
as Ranma Saotome ♂ (voice)
Lupin the Third vs. Detective Conan (2009)
as Shinichi Kudo (voice)
Inuyasha the Movie 3: Swords of an Honorable Ruler (2003)
as Inuyasha (voice)
One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream! (2003)
as Usopp (voice)
Ressha Sentai ToQger vs. Kyoryuger: The Movie (2015)
as Ticket (voice)
Battle Angel (1993)
as Yūgo (voice)
Animal Crossing: The Movie (2006)
as Fûta (voice)
TIGER & BUNNY: The Beginning (2012)
as Robin Baxter (voice)
One Piece Episode of Alabasta Prologue (2011)
as Usopp (voice)
One Piece Episode of East Blue (2017)
as Usopp (voice)
Inuyasha the Movie 4: Fire on the Mystic Island (2004)
as Inuyasha (voice)
Alice in Wonderland –Dive in Wonderland– (2025)
as The White Rabit (voice)
One Piece: Glorious Island (2012)
as Usopp (voice)
One Piece: Dream Soccer King! (2002)
as Usopp (voice)
One Piece: Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom (2008)
as Usopp (voice)
Detective Conan vs. Kid the Phantom Thief (2024)
as Kaito Kuroba / Kaito Kid (voice)
Escaflowne: The Movie (2000)
as Shesta (voice)
Luffy's Fall! The Unexplored Region - Grand Adventure in the Ocean's Navel (2000)
as Usopp (voice)
One Piece: Dead End Adventure (2003)
as Usopp (voice)
Zyuden Sentai Kyoryuger vs. Go-Busters: The Great Dinosaur War (2014)
as ToQger equipment (voice)
Ranma 1/2: Team Ranma vs. the Legendary Phoenix (1994)
as Ranma Saotome ♂ (voice)
One Piece Episode of Sabo: The Three Brothers' Bond - The Miraculous Reunion and the Inherited Will (2015)
as Usopp (voice)
Samurai X: The Motion Picture (1997)
as Yasuharu Musashino
One Piece: Episode of Luffy - Hand Island Adventure (2012)
as Usopp (voice)
A Wind Named Amnesia (1990)
as Johnny (voice)
Heart and Yummie (2010)
as Heart (voice)
One Piece: Heart of Gold (2016)
as Usopp (voice)
One Piece Episode of Merry: The Tale of One More Friend (2013)
as Usopp (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China (1991)
as Ranma Saotome ♂ (voice)
One Piece Episode of Nami: Tears of a Navigator and the Bonds of Friends (2012)
as Usopp (voice)
Case Closed: Zero the Enforcer (2018)
as Shinichi Kudo / Kaito Kid (voice)
Urotsukidōji II: Legend of the Demon Womb (1991)
as Young Munchausen II (voice)
Urusei Yatsura: The Obstacle Course Swim Meet, It's a Rumic World: Urusei Yatsura (2008)
as (voice)
Peacemaker Kurogane: Belief (2018)
as Shinpachi Nagakura (voice)
Planetarium HANAKAPPA: Bloom! Pop! Space Travel (2018)
as Garizo (voice)
Inferious Interplanetary War Chronicle - Condition Green (1991)
as Oscar Cloud (voice)
Plastic Little: The Adventures of Captain Tita (1994)
as Nicole (voice)
One Piece 3D: Gekisou! Trap Coaster (2011)
as Usopp (voice)
Serena x One Piece: Sennyuu!! Sauzando Sunny-gou (2011)
as Usopp (voice)
A Tree of Palme (2002)
as Roualt (voice)
Nineteen 19 (1990)
as Hiroaki Kusano (voice)
It's a Rumic World: 50th Anniversary Weekly★Shonen Sunday (2008)
as Inuyasha / Ranma Saotome ♂ (voice)
One Piece Film Gold: Episode 0 (2016)
as Usopp (voice)
Ressha Sentai ToQger vs. Kamen Rider Gaim: Spring Break Combined Special (2014)
as Ticket / ToQger Equipment (voice)
Detective Conan: The Scarlet School Trip (2019)
as Shinichi Kudo (voice)
Asura (2012)
Actor
Dragon Knight: Wheel of Time (1998)
as Kakeru
ODDTAXI in the Woods (2022)
as Eiji Kakihana (voice)
HANAKAPPA's Traffic Safety: Turn Right, Left, Right in Search of a Cake (2013)
as Garizo (voice)
One Piece Fan Letter (2024)
as Usopp
Giant Robo: The Day the Earth Stood Still (1992)
as Daisaku Kusama
Pretty Cure All Stars DX: Everyone Is a Friend - A Miracle All Pretty Cures Together (2009)
as Flappy (voice)
Atashin'chi: The 3D Movie (2010)
as Fujino (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014)
as ToQger Equipment Voice
Bronze: Zetsuai Since 1989 (1996)
as Shibuya (voice)
Persona4 the ANIMATION -The Factor of Hope (2012)
as Kuma (voice)
One Piece: Romance Dawn Story (2008)
as Usopp (voice)
Kindaichi Case Files : The Opera House Murders (1996)
as Hajime Kindaichi (Voice)
Nagasaki 1945 ~ The Angelus Bells (2005)
Actor
Pokémon: Pikachu's Rescue Adventure (1999)
as Parasect (voice)
Dead Leaves (2004)
as Retro (voice)
Pretty Cure All Stars DX3: Deliver the Future! The Rainbow-Colored Flower That Connects the World (2011)
as Flappy
Shuriken Sentai Ninninger vs. ToQger the Movie: Ninjas in Wonderland (2016)
as Ticket (voice), ToQger Equipment Voice
One Piece - En route vers l'épisode 1000 (2021)
as Comédien de doublage de Usopp – Japon
Pretty Cure All Stars New Stage: Friends of the Future (2012)
as Flappy
The Adventures of Tyrano Boy (2015)
as Zesta (voice)
Futari wa Precure Splash☆Star the Movie: Tic-Tac Crisis Hanging by a Thin Thread! (2006)
as Flappy (voice)
Pretty Cure All Stars DX2: The Light of Hope - Protect the Rainbow Jewel! (2010)
as Flappy (voice)
Space Battleship Yamato Resurrection (2009)
as Ryohei Nakanishi (voice)
Baby Felix & Friends (2000)
as Poindexter
The Heroic Legend of Arslan II (1992)
Actor
Grappler Baki: The Ultimate Fighter (1994)
as Baki Hanma
That's HANAKAPPA Musical: Bread or Rice, Which Is It!? (2013)
as Garizo (voice)
Shadow Skill: The Movie (1996)
as Scrib Lowengren
Tottoi (1992)
as Billia (voice)
Case Closed: The Fist of Blue Sapphire (2019)
as Shinichi Kudo / Kaito Kuroba (voice)
K.O. Beast (1992)
Actor
Yona Yona Penguin (2009)
as Mulmul (voice)
Detective Conan: The 17-Year-Old Truth (2025)
as Shinichi Kudo (voice)
Stage Play 「Spooky Kitaro」 (2025)
Actor
Shadow Skill: Epilogue (1995)
as Scrib Lowengren (voice)
Kishin Douji Zenki Gaiden: Anki Kitan (1997)
as Zenki
Hanappe Bazooka (1992)
as Hanahei Yamada (voice)
Pretty Guardian Sailor Moon Special Act: We're Getting Married!！ (2004)
Actor
Devil Hunter Yohko (1990)
Actor
Violence Jack: Hell's Wind (1990)
as Saburo Tenma
One Piece: The Great Treasure of Tongari Island (2016)
as Usopp (voice)
Delinquent in Drag (1992)
as Suke Banji (voice)
One Piece Special: Protect! The Last Great Stage (2003)
as Usopp (voice)
One Piece: The Adventure in Grand Line (2002)
as Usopp (voice)
Ultraman Super Fighter Legend (1996)
as Astra / Announcer Banjou (voice)
Eternal Family (1997)
as Sasuke (voice)
One Piece Special: The Detective Memoirs of Chief Straw Hat Luffy (2005)
as Usopp (voice)
Super Sentai Strongest Battle Director's Cut (2019)
as ToQger Arsenal (voice)
The Heroic Legend of Arslan (1991)
Actor
Chibi Maruko-chan (1990)
as Kenichi Oono (voice)
Bonobono: Secret of the Kumomo Tree (2002)
as Araiguma-kun
Camp Pikachu (2002)
as Barubeat (voice)
Virgin Fleet (1998)
as Sada
Ranma ½: Nightmare! Incense of Spring Sleep (2008)
as Ranma Saotome ♂ (voice)
Barefoot Gin Rei (1994)
as Daisaku Kusama (voice)
Mouse Story: The Adventures of George and Gerald (2007)
as Chamberlain
Netrun-mon the Movie (2004)
as BB Runner
Butt Attack Punisher Girl Gautaman: The Birth of Gautaman (1994)
as Shibuya (voice)
Noiseman Sound Insect (1997)
as Manabu (voice)
Detective Conan: Black History (2007)
Actor
Futari wa Precure Splash☆Star: Maji Doki Theater (2006)
as Flappy (voice)
Ressha Sentai ToQger Returns: Super ToQ #7 of Dreams (2015)
as Ticket (voice)
Ryokunohara Labyrinth - Sparkling Phantom (1990)
as Kanata Tokino
Chibi Maruko-chan: My Favorite Song (1992)
as Kenichi Oono (voice)
The Mighty Gin Rei (1994)
as Daisaku Kusama (voice)
Detective Conan Magic File (2007)
Actor
Appleland Story (1992)
as Virgil
Twinbee PARADISE (1998)
Actor
Crows (1994)
Actor
Conan vs. Kaito Kid (1997)
as Kaito Kid
Tomcat's Big Adventure (2014)
as Michael (voice)
Pa-Pa-Pa the Movie: Perman: Tako de Pon! Ashi wa Pon! (2004)
Actor
Gosho Aoyama’s Collection of Short Stories (1999)
Actor
Butt Attack Punisher Girl Gautaman R: The Final Battle Between Love & Tragedy! (1994)
as Shibuya (voice)
Ressha Sentai ToQger The Movie: Galaxy Line S.O.S. (2014)
as Ticket / ToQger Equipment / Narrator (voice)
Coicent (2010)
as White Deer (voice)
Dragon Quest - Emblem of Roto (1996)
Actor
Madara (1991)
as (voice)
My Dread is School! Kanako Inuki Shout Collection (1999)
as Bukita
Magical Circle Guru Guru (1996)
Actor
Kamiwaza Wanda (2017)
Actor
Pokémon Mystery Dungeon: Explorers of Time & Darkness (2007)
as Chimchar (voice)
Desperate Love 1989 (1992)
as Katsumi Shibuya (voice)
Trusty Ginjiro (1991)
as Ginjiro Yamazaki (voice)
HANAKAPPA: Adventure in the Butterfly Kingdom (2013)
as Garizo (voice)
Samurider: Nazo no Tenkousei (1991)
as 山口
Tokyo Babylon 2 (1994)
as Subaru Sumeragi
Tokyo Babylon 1 (1992)
as Subaru Sumeragi
Blue Memories: Boys, Colonizing Manchuria and Mongolia (1993)
as Kyota Suzuki (voice)
Guitar wo Motta Shounen: Kikaider VS Inazuman (2003)
as Saburo Kazeta/Inazuman
Tomorrow Will Be Better! Half a Sweet Potato (2005)
Actor
Boyfriend (1992)
as Ougi (voice)
Neighborhood Story The Movie (1996)
as Tsutomu Yamaguchi (voice)
Pichu & Pikachu's Winter Vacation 2001 (2000)
as Delibird (voice)
Ressha Sentai ToQger Final Live Tour 2015 (2015)
as Ticket / ToQger Equipment Voice (voice)
Silent Mobius Gaiden: The End of the Edo Period (1993)
Actor
Unification of Japan Gaiden: Yamazaki Family — Joji and His Merry Friends (2024)
Actor
Pretty Guardian Sailor Moon: Act Zero (2005)
Actor
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
Welcome to Lodoss Island! (1998)
as Etoh (voice)
Engimon (2018)
Actor
Ressha Sentai ToQger DVD Special: Farewell, Ticket! The Wasteland Super ToQ Battle! (2014)
as Ticket (voice)
VISUALIVE Persona 4 (2012)
as Kuma (voice)
Okaeri: Furusato no Karatsu (2017)
as Sora Hiroi (voice)
La Blue Girl: Climax Taizen (2002)
as Nin-Nin
Bondage Queen Kate (1994)
as Dick (voice)