Toshihiko Seki

Known for

Acting

Life

Born 1962 (age 64)

Born in

Sendai, Japon

Credits

240 acting credits

View on IMDb

Biography

Toshihiko Seki, born on June 11, 1962, in Sendai, Miyagi Prefecture, Japan, is a celebrated Japanese voice actor, actor, singer, and narrator. He has been active in the entertainment industry since 1983 and is affiliated with 81 Produce, a prominent talent agency.

Seki is known for his versatility, often voicing characters with serious or easily agitated personalities, such as Duo Maxwell in Mobile Suit Gundam Wing, Iruka Umino in Naruto, Kaien Shiba in Bleach and Riki in Ai no Kusabi. He has also portrayed deranged villains like Legato Bluesummers in Trigun and Muzan Kibutsuji in Demon Slayer: Kimetsu no Yaiba. One of his most iconic roles is Momotaros in Kamen Rider Den-O, a character he has reprised in numerous productions.

In addition to his work in anime, Seki has contributed to video games, movies, and dubbing. His talent and dedication have earned him recognition, including being ranked as the 9th favorite voice actor in the 26th Annual Reader's Poll by Animage Magazine in 2004.

Known For

Naruto Shippūden

15 Feb 2007

Demon Slayer: Kimetsu no Yaiba

06 Apr 2019

Naruto

03 Oct 2002

Castle in the Sky

02 Aug 1986

Bleach

05 Oct 2004

Hunter x Hunter

02 Oct 2011

Demon Slayer: Kimetsu no Yaiba Infinity Castle

18 Jul 2025

Ranma ½

15 Apr 1989

Filmography

2026

Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hias Cosmo Gavarion System Voice
My Ribdiculous Reincarnation12 episodes
Super Space Sheriff Gavan Infinity: Jo-Chaku Courseas Gavarion Trigger System Voice (voice)
PROJECT R.E.D.as GavarionTrigger23 episodes

2025

SANDAas Hifumi Ōshibu (voice)12 episodes
Demon Slayer: Kimetsu no Yaiba Infinity Castleas Muzan Kibutsuji (voice)
U Takes Terraas Chongyue (Voice)1 episode
Mashin Creator Wataruas Mr. Liar (voice)2 episodes
I Have a Crush at Workas Pastor (voice)1 episode

2024

Nintama Rantarō: Invincible Master of the Dokutake Ninjaas Hansuke Doi (voice)
Good Bye, Dragon Lifeas Dio (voice)3 episodes
Ranma1/2as Mousse (voice)4 episodes
I Parry Everythingas Carew (voice)12 episodes
Kaiju No. 8as Kaiju No. 11 (voice)1 episode

2023

The Birth of Kitaro: The Mystery of GeGeGeas Kitarou's Father (voice)
Onimushaas Kojiro Sasaki (voice)8 episodes
PLUTOas Pluto (voice)3 episodes
The Most Heretical Last Boss Queen: From Villainess to Savioras Clark Darwin (voice)12 episodes
Rurouni Kenshinas Narration (voice)21 episodes
Black Clover: Sword of the Wizard Kingas Conrad Leto (voice)
HIGH CARDas Norman Kingstat (voice)12 episodes

2019

Ascendance of a Bookwormas Eustachius (voice)6 episodes
SAINT SEIYA: Knights of the Zodiacas Scorpio Milo (voice)1 episode
Sarazanmaias Yuri Kamome1 episode
Demon Slayer: Kimetsu no Yaibaas Muzan Kibutsuji (voice)13 episodes
Demon Slayer: Kimetsu no Yaiba - Sibling's Bondas Muzan Kibutsuji (voice)
Star☆Twinkle PreCureas Toto Hagoromo (voice)3 episodes

2018

Kamen Rider Heisei Generations Foreveras Momotaros
Saint Seiya: Saintia Shoas Scorpio Milo (voice)10 episodes
Golden Kamuyas Kazuo Henmi (voice)62 episodes
SWORD GAI: The Animationas Miura Takuma12 episodes
The Ryuo's Work is Never Done!as Kiyotaki Kousuke (voice)12 episodes

2017

Mazinger Z: Infinityas Tetsuya Tsurugi (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-as Momotaros
THE REFLECTIONas Michael Holden (voice)12 episodes
The Laughing Salesman NEWas Shisao Kihara(Story2)12 episodes
Kamen Rider × Super Sentai: Ultra Super Hero Warsas Momotaros - Kamen Rider Den-O Sword Form (voice)

2016

To Be Heroas Chinese Tohoku Muffler (voice)12 episodes
Mob Psycho 100as Musashi Goda (voice)14 episodes
Naruto OVA 12: The Day Naruto Became Hokageas Iruka Umino (voice)
Descending Storiesas Eisuke Higuchi (voice)25 episodes

2015

Mobile Suit Gundam: The Origin II - Artesia's Sorrowas Char Aznable (voice)
Saint Seiya: Soul of Goldas Scorpio Milo (voice)13 episodes

2014

Cross Ange: Rondo of Angels and Dragonsas Embryo (voice)25 episodes
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentaias Kamen Rider Den-O Sword Form (voice)
Space Dandyas Public Prosecutor (voice)1 episode

2013

Hunter x Hunter: The Last Missionas Wing (voice)
Gingitsune: Messenger Fox of the Godsas Tatsuo Saeki (voice)12 episodes
声優戦隊ボイストーム7as (voice)11 episodes
Higurashi: When They Cry - Outbreakas Kyousuke Irie (voice)
Triple Combination: Transformers Go!as Gekisōmaru (voice)10 episodes

2012

Road to Ninja: Naruto the Movieas Iruka Umino (voice)
Kamen Rider × Super Sentai: Super Hero Warsas Momotaros - Kamen Rider Den-O Sword Form (voice)
Glitter Forceas Hiroshi Hoshizora48 episodes

2011

Guilty Crownas Kurosu Ouma (voice)1 episode
Hunter x Hunteras Wing (voice)10 episodes
Detective Conan: Quarter of Silenceas Shogo Hikawa (voice)
OOO, Den-O, All Riders: Let's Go Kamen Ridersas Momotaros
Saiyuki Gaidenas Konzen Dōji (voice)4 episodes
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!as Hansuke Doi (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~as Momotaros (voice)

2010

Psychic Detective Yakumoas Isshin Saitō13 episodes
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Piratesas Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtralas Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkleas Momotaros (voice)
Katanagatarias Umigame Maniwa (voice)12 episodes
Kamen Rider Decade: Final Stageas Momotaros

2009

Kamen Rider × Kamen Rider W & Decade: Movie War 2010as Kamen Rider Den-O (voice)
10th Anniversary Project: Masked Rider LIVE & SHOWas Kamen Rider Den-O Sword Form (voice)
Kamen Rider Decade: All Riders vs. Dai-Shockeras Momotaros
Dogs: Bullets & Carnageas Ernst Rammsteiner4 episodes
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warshipas Momotaros (voice)
Cookin' Idol Ai! Mai! Main!as 柊修25 episodes
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-as Momotaros (voice)
Kamen Rider Kiva & Den-O: DenLiner, Into Space!as Momotaros (voice)

2008

Imagin Anime: Momotaros Forever!/Imajin Terminal Stationas Momotaros (voice)
A Certain Magical Indexas Aleister Crowley (voice)9 episodes
Farewell Kamen Rider Den-O: Final Countdownas Momotaros (voice)
Kamen Rider Kiva: King of the Castle in the Demon Worldas Penetentiary Officer Sanjo
Momotaros' King of the Crimson Castleas Momotaros (voice)
Kamen Rider Den-O: Final Trilogy Special Editionas Momotaros (voice)
Momotaros' King of the Crimson Castleas Momotaros (voice)4 episodes
Blade of the Immortalas Souri (voice)2 episodes
Sekireias Hiroto Minaka25 episodes
Kamen Rider Den-O: Imagin Animeas Momotaros (voice)34 episodes
Kamen Rider Den-O & Kiva: Climax Dekaas Momotaros (voice)

2007

Kamen Rider Den-O: Final Stageas Momotaros
Kamen Rider Den-O: Singing, Dancing, Great Training!!as Momotaros (voice)
Kamen Rider Den-O The Movie: I'm Born!as Momotaros (voice)
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!as Momotaros (voice)
Momotaros' Summer Vacationas Momotaros (voice)
Saiyuki Reload: Burialas Genjō Sanzō (voice)3 episodes
Naruto Shippūdenas Iruka Umino (voice)320 episodes
Kamen Rider Den-Oas Momotaros (voice)49 episodes

2006

Shonen Onmyouji26 episodes
Loving Angel Angeliqueas Luva
Higurashi: When They Cryas Kyousuke Irie (voice)10 episodes

2005

My-Otomeas Rad (voice)26 episodes
MÄR: Märchen Awakens Romanceas Danna Toramizu102 episodes

2004

Gin'yuu Mokushiroku Meine Liebeas Ludwig Herzog von Mohn nahe Liechtenstein (voice)26 episodes
Bleachas Aaroniero Arruruerie (voice)
My-Himeas Reito Kanzaki (voice)26 episodes
Samurai Champlooas Yamane (voice)26 episodes
Paranoia Agentas Mitsuhiro Maniwa (voice)13 episodes
Paranoia Agent: Part 1as まにわみつひろ

2003

Requiem from the Darknessas Momosuke Yamaoka (voice)13 episodes

2002

Saint Seiya: The Hades Chapteras Milo (voice)10 episodes
Mobile Suit Gundam SEEDas Rey Za Burrel (voice)50 episodes
Narutoas Iruka Umino (voice)220 episodes
Saiyuki Interactive
Animation Store Manageras Ryuu Raiba (voice)
Angelique: Twin Collectionas Luva (voice)8 episodes
Mirage of Blazeas Takaya Ohgi (voice)13 episodes

2001

Saiyuki: Requiemas Genjo Sanzo (voice)

2000

Reign: The Conqueror Movieas Alexander
Descendants of Darknessas Yutaka Watari (voice)13 episodes
Saiyukias Konzen Douji (voice)50 episodes
Baby Felix & Friendsas Felix The Cat

1999

Reign: The Conqueroras Alexander (voice)13 episodes
Pet Shop of Horrorsas Count D (voice)4 episodes
Bビーダマン爆外伝Vas Kurobon50 episodes
Harlock Saga - The Ring of the Nibelungs6 episodes

1998

Gundam Wing: The Endless Waltzas Duo Maxwell (voice)
Nightwalker: The Midnight Detectiveas Bait12 episodes
TRIGUNas Legato Bluesummers (voice)7 episodes
Bomberman B-Daman Bakugaiden48 episodes
Outlaw Staras Fred (voice)26 episodes

1997

Twilight of the Dark Masteras Shijo Tsunami (voice)
Chimera: Angel of Deathas Ron
Dragoonas Rain Keeves Fearudo (voice)3 episodes
Hakugei: Legend of the Moby Dick26 episodes
Hyper Policeas Sakunoshin Chikura25 episodes

1996

Ultraman Super Fighter Legendas Ultraseven
Xas Shougo
Yawara! Atlanta Special
Violinist of Hamelin: The Movieas Raiel (voice)
B'T Xas Quatro (voice)14 episodes
The Legend of Zorroas Don Diego de la Vega52 episodes
Special Duty Combat Unit Shinesmanas Shujin Seki (voice)2 episodes
The End of the Century Darlingas Todorokki Kouhei (voice)

1995

Bio Hunteras Komada
Mobile Suit Gundam Wingas Duo Maxwell (voice)49 episodes
Udauda Yatteru Hima wa Nee!as (voice)2 episodes

1994

Wild 7: Biker Knightsas Dairoku Hiba
Wild 7as Dairoku Hiba2 episodes
The Irresponsible Captain Tylor OVAas Dom (voice)10 episodes
I'm Not an Angel!as Bunta Kouno (voice)
Love Wedge 2as Riki (voice)
Dorami-chan: A Blue Straw Hatas Crow (voice)
Genocyberas Sakomizu (voice)
Natsuki Crisisas Kyōtarō Himuro2 episodes

1993

Please Save My Earthas Mikuro Yakushimaru (voice)6 episodes
Black Jackas Tokio Umetani (voice)1 episode
Aoki Densetsu Shoot!as Akihiko Himuro (voice)58 episodes
Ocean Wavesas Yutaka Matsuno (voice)
Suikoden Demon Centuryas Takateru Suga (voice)
Kiss Me on the Apple of My Eyeas Naoto (voice)
Ninja Scrollas Yurimaru (voice)
Ninja Boy Rantaroas Hansuke Doi683 episodes
The Irresponsible Captain Tyloras Ru Baraba Dom26 episodes

1992

Download: Devil's Circuitas Sid (voice)
D-1 Devastatoras 谷田辺了2 episodes
Oruorane the Cat Playeras The Cellist
Love Wedge 1as Riki (voice)
Ai no Kusabias Riki (voice)2 episodes
Bastard!!6 episodes
Ranma 1/2 the Movie 2: Nihao My Concubineas Mousse (voice)
Yawara! Go Get 'Em, Wimpy Kids!!as (voice)
Princess Army: Wedding Combatas Yuuya Hashiba2 episodes
Calico Cat Holmes and the Lord of the Haunted Castleas Yoshitaro Katayama (voice)
The Weathering Continentas Tieh (voice)

1991

Moonlight Pierceas Hiroshi Takama (voice)
Nyūin Bokki Monogatari Ojiji ni!2 episodes
Inferious Interplanetary War Chronicle - Condition Greenas Soo Laform (voice)
Here Is Greenwoodas Shinobu Tezuka (voice)6 episodes
Ranma 1/2 the Movie: Big Trouble in Nekonron, Chinaas Mousse (voice)
Handsome Girlas Ichiya Kumagai (voice)
Izumoas Izumo (voice)2 episodes
Legend of Heavenly Sphere Shurato: The Secret Feud of Creationas Shurato6 episodes
Detonator Orgunas Knock3 episodes
Yuukan Club
Nadia: The Secret of Blue Water - The Motion Pictureas Falt (voice)
Nadia: The Secret of Blue Water - Nautilus Story IIas Fate (voice)
Trusty Ginjiroas Hideki Mitsui (voice)
Hisashi Eguchi's Kotobuki Goro Showas Piston Akagi (voice)
Blazing Transfer Studentas Noboru Takizawa (voice)2 episodes
Akai Hayate4 episodes
Future GPX Cyber Formulaas Jotaro Kaga64 episodes

1990

The Hakkenden: Legend of the Dog Warriorsas Shino Inuzuka (voice)13 episodes
TOKYO CITY Melhen 2
Marina the Manga Artist Goes to Camelotas Bijomaru Shizuka (voice)
Midoriyama High School, Koshien Edition (Movie)
Milky Passion: Dougenzaka - The Castle of Loveas Ootsuki (voice)
Goddamnas Hans Schultz
Goddamnas Hans Schultz2 episodes
Nadia: The Secret of Blue Wateras Fejto (voice)39 episodes
Heart-Coloured Killer Ticketas Chuta Misora (voice)
Ryokunohara Labyrinth - Sparkling Phantomas Hiroki Imashi

1989

Demon Hunter Makaryūdoas Shou Kurogane (voice)
Yawara!as Matsuda124 episodes
Darkness of the Sea, Shadow of the Moonas Katsuyuki Touma (voice)3 episodes
Dash! Yonkuro25 episodes
Angel Copas Tachihara (voice)
Cinderella Expressas Yuji Shimano
Star Cat Full House4 episodes
Scarlet Demon
Ranma ½as Mousse (voice)13 episodes
Madö King Granzörtas Grunwald41 episodes
Shuratoas Shurato38 episodes
Nightsong of Splendor4 episodes
Hades Project: Zeorymer Extinctionas Masato Akitsu

1988

Kaze wo Nuke!
Hades Project: Zeorymer Separationas Masaki Kihara (voice)
Hades Project Zeorymeras (voice)4 episodes
Armor Hunter Merowlinkas PFC Cepres1 episode
Dragon Centuryas Carmine (voice)
Dragon Centuryas Carmine2 episodes
Sunlight All Around! Ka - su - mi: You Were in My Dreamsas Reporter B (voice)
Zillion: Burning Nightas J.J. (voice)
Spirit Warrioras Kujaku (voice)3 episodes
Balthus: Tia's Radianceas Eud (voice)
Fas Gunma Akagi (voice)31 episodes

1987

The Samuraias Takeshi Chimatsuri
TO-Yas Shouji (voice)
Zillionas JJ31 episodes
Maryuu Senki
Evil Dragon War Chroniclesas 錦繍 (voice)2 episodes
Campus Special Investigator Hikaruonas Hikaru Shihodo

1986

Castle in the Skyas Additional Voices (voice)
Call Me Tonightas Hayata (voice)

1985

Magical Emi, the Magic Staras Customer A (voice)1 episode

1971

Kamen Rideras Momotaros (voice)54 episodes