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