Acting · Sendai, Japon · Born June 11, 1962
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.
MovieChō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
2026
as Cosmo Gavarion System Voice / Gavarion Trigger System Voice
TVMy Ribdiculous Reincarnation
2026
MovieSuper Space Sheriff Gavan Infinity: Jo-Chaku Course
2026
as Gavarion Trigger System Voice (voice)
TVPROJECT R.E.D.
2026
as GavarionTrigger / CosmoGavarion (voice)
TVSANDA
2025
as Hifumi Ōshibu (voice)
MovieDemon Slayer: Kimetsu no Yaiba Infinity Castle
2025
as Muzan Kibutsuji (voice)
TVU Takes Terra
2025
as Chongyue (Voice)
TVMashin Creator Wataru
2025
as Mr. Liar (voice)
TVI Have a Crush at Work
2025
as Pastor (voice)
MovieNintama Rantarō: Invincible Master of the Dokutake Ninja
2024
as Hansuke Doi (voice)
TVGood Bye, Dragon Life
2024
as Dio (voice)
TVRanma1/2
2024
as Mousse (voice)
TVI Parry Everything
2024
as Carew (voice)
TVKaiju No. 8
2024
as Kaiju No. 11 (voice)
MovieThe Birth of Kitaro: The Mystery of GeGeGe
2023
as Kitarou's Father (voice)
TVOnimusha
2023
as Kojiro Sasaki (voice)
TVPLUTO
2023
as Sahad (voice)
TVThe Most Heretical Last Boss Queen: From Villainess to Savior
2023
as Clark Darwin (voice)
TVRurouni Kenshin
2023
as Narration (voice)
MovieBlack Clover: Sword of the Wizard King
2023
as Conrad Leto (voice)
TVHIGH CARD
2023
as Norman Kingstat (voice)
MovieDemon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
as Muzan Kibutsuji (voice)
TVAvataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
2022
as Momotaros (voice)
MovieMy Hero Academia: World Heroes' Mission
2021
as Eddie Soul (voice)
MovieKamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
as Momotaros (voice) / Kamen Rider Den-O (voice)
TVHigurashi: When They Cry - NEW
2020
as Kyousuke Irie (voice)
MovieKamen Rider Den-O: The Birth of Pretty Den-O!
2020
as Momotaros (voice)
TVThe Misfit of Demon King Academy
2020
as Ahide Alobo Agatze (voice)
TVAscendance of a Bookworm
2019
as Eustachius (voice)
TVSAINT SEIYA: Knights of the Zodiac
2019
as Scorpio Milo (voice)
TVSarazanmai
2019
as Yuri Kamome
TVDemon Slayer: Kimetsu no Yaiba
2019
as Muzan Kibutsuji (voice)
MovieDemon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
as Muzan Kibutsuji (voice)
TVStar☆Twinkle PreCure
2019
as Toto Hagoromo (voice)
MovieKamen Rider Heisei Generations Forever
2018
as Momotaros / Kamen Rider Den-O Sword Form (voice)
TVSaint Seiya: Saintia Sho
2018
as Scorpio Milo (voice)
TVGolden Kamuy
2018
as Kazuo Henmi (voice)
TVSWORD GAI: The Animation
2018
as Miura Takuma
TVThe Ryuo's Work is Never Done!
2018
as Kiyotaki Kousuke (voice)
MovieMazinger Z: Infinity
2017
as Tetsuya Tsurugi (voice)
MovieSaraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017
as Momotaros
TVTHE REFLECTION
2017
as Michael Holden (voice)
TVThe Laughing Salesman NEW
2017
as Shisao Kihara(Story2)
MovieKamen Rider × Super Sentai: Ultra Super Hero Wars
2017
as Momotaros - Kamen Rider Den-O Sword Form (voice)
TVTo Be Hero
2016
as Chinese Tohoku Muffler (voice)
TVMob Psycho 100
2016
as Morizo Ebihara (voice)
MovieNaruto OVA 12: The Day Naruto Became Hokage
2016
as Iruka Umino (voice)
TVShowa Genroku Rakugo Shinju
2016
as Eisuke Higuchi (voice)
MovieMobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
as Char Aznable (voice)
TVSaint Seiya: Soul of Gold
2015
as Scorpio Milo (voice)
TVCross Ange: Rondo of Angels and Dragons
2014
as Embryo (voice)
MovieHeisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
as Kamen Rider Den-O Sword Form (voice)
TVSpace Dandy
2014
as Public Prosecutor (voice)
MovieHunter x Hunter: The Last Mission
2013
as Wing (voice)
TVGingitsune: Messenger Fox of the Gods
2013
as Tatsuo Saeki (voice)
TV声優戦隊ボイストーム7
2013
as (voice)
MovieHigurashi: When They Cry - Outbreak
2013
as Kyousuke Irie (voice)
TVTriple Combination: Transformers Go!
2013
as Gekisōmaru (voice)
MovieRoad to Ninja: Naruto the Movie
2012
as Iruka Umino (voice)
MovieKamen Rider × Super Sentai: Super Hero Wars
2012
as Momotaros - Kamen Rider Den-O Sword Form (voice)
TVGlitter Force
2012
as Hiroshi Hoshizora
TVGuilty Crown
2011
as Kurosu Ouma (voice)
TVHunter x Hunter
2011
as Wing (voice)
MovieDetective Conan: Quarter of Silence
2011
as Shogo Hikawa (voice)
MovieOOO, Den-O, All Riders: Let's Go Kamen Riders
2011
as Momotaros / Kamen Rider Den-O Sword Form (voice)
TVSaiyuki Gaiden
2011
as Konzen Dōji (voice)
MovieNintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
as Hansuke Doi (voice)
MovieOOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
2011
as Momotaros (voice)
TVPsychic Detective Yakumo
2010
as Isshin Saitō
MovieKamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
MovieSuper Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
as Momotaros (voice)
MovieSuper Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
2010
as Momotaros (voice)
MovieSuper Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
2010
as Momotaros (voice)
TVKatanagatari
2010
as Umigame Maniwa (voice)
MovieKamen Rider Decade: Final Stage
2010
as Momotaros / Kamen Rider Den-O (Sword Form)
MovieKamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
as Kamen Rider Den-O (voice)
Movie10th Anniversary Project: Masked Rider LIVE & SHOW
2009
as Kamen Rider Den-O Sword Form (voice)
MovieKamen Rider Decade: All Riders vs. Dai-Shocker
2009
as Momotaros / Kamen Rider Den-O (voice)
TVDogs: Bullets & Carnage
2009
as Ernst Rammsteiner
MovieSuper Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
as Momotaros (voice)
TVCookin' Idol Ai! Mai! Main!
2009
as 柊修
MovieSaraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2009
as Momotaros (voice)
MovieKamen Rider Kiva & Den-O: DenLiner, Into Space!
2009
as Momotaros (voice)
MovieImagin Anime: Momotaros Forever!/Imajin Terminal Station
2008
as Momotaros (voice)
TVA Certain Magical Index
2008
as Aleister Crowley (voice)
MovieFarewell Kamen Rider Den-O: Final Countdown
2008
as Momotaros (voice)
MovieKamen Rider Kiva: King of the Castle in the Demon World
2008
as Penetentiary Officer Sanjo
MovieMomotaros' King of the Crimson Castle
2008
as Momotaros (voice)
MovieKamen Rider Den-O: Final Trilogy Special Edition
2008
as Momotaros (voice)
TVMomotaros' King of the Crimson Castle
2008
as Momotaros (voice)
TVBlade of the Immortal
2008
as Souri (voice)
TVSekirei
2008
as Hiroto Minaka
TVKamen Rider Den-O: Imagin Anime
2008
as Momotaros (voice)
MovieKamen Rider Den-O & Kiva: Climax Deka
2008
as Momotaros (voice)
MovieKamen Rider Den-O: Final Stage
2007
as Momotaros
MovieKamen Rider Den-O: Singing, Dancing, Great Training!!
2007
as Momotaros (voice)
MovieKamen Rider Den-O The Movie: I'm Born!
2007
as Momotaros (voice)
MovieCrayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
2007
as Momotaros (voice)
MovieMomotaros' Summer Vacation
2007
as Momotaros (voice)
TVSaiyuki Reload: Burial
2007
as Genjō Sanzō (voice)
TVNaruto Shippūden
2007
as Iruka Umino (voice)
TVKamen Rider Den-O
2007
as Momotaros (voice)
TVShonen Onmyouji
2006
TVLoving Angel Angelique
2006
as Luva
TVHigurashi: When They Cry
2006
as Kyousuke Irie (voice)
TVMy-Otome
2005
as Rad (voice)
TVMÄR: Märchen Awakens Romance
2005
as Danna Toramizu
TVGin'yuu Mokushiroku Meine Liebe
2004
as Ludwig Herzog von Mohn nahe Liechtenstein (voice)
TVBleach
2004
as Aaroniero Arruruerie (voice)
TVMy-Hime
2004
as Reito Kanzaki (voice)
TVSamurai Champloo
2004
as Yamane (voice)
TVParanoia Agent
2004
as Mitsuhiro Maniwa (voice)
MovieParanoia Agent: Part 1
2004
as まにわ みつひろ
TVRequiem from the Darkness
2003
as Momosuke Yamaoka (voice)
TVSaint Seiya: The Hades Chapter
2002
as Milo (voice)
TVMobile Suit Gundam SEED
2002
as Rau Le Creuset (voice)
TVNaruto
2002
as Iruka Umino (voice)
MovieSaiyuki Interactive
2002
MovieAnimation Store Manager
2002
as Ryuu Raiba (voice)
TVAngelique: Twin Collection
2002
as Luva (voice)
TVMirage of Blaze
2002
as Takaya Ohgi (voice)
MovieSaiyuki: Requiem
2001
as Genjo Sanzo (voice)
MovieReign: The Conqueror Movie
2000
as Alexander
TVDescendants of Darkness
2000
as Yutaka Watari (voice)
TVSaiyuki
2000
as Konzen Douji (voice)
MovieBaby Felix & Friends
2000
as Felix The Cat
TVReign: The Conqueror
1999
as Alexander (voice)
TVPet Shop of Horrors
1999
as Count D (voice)
TVBビーダマン爆外伝V
1999
as Kurobon
TVHarlock Saga - The Ring of the Nibelungs
1999
MovieGundam Wing: The Endless Waltz
1998
as Duo Maxwell (voice)
TVNightwalker: The Midnight Detective
1998
as Bait
TVTRIGUN
1998
as Legato Bluesummers (voice)
TVBomberman B-Daman Bakugaiden
1998
TVOutlaw Star
1998
as Fred (voice)
MovieTwilight of the Dark Master
1997
as Shijo Tsunami (voice)
MovieChimera: Angel of Death
1997
as Ron
TVDragoon
1997
as Rain Keeves Fearudo (voice)
TVHakugei: Legend of the Moby Dick
1997
TVHyper Police
1997
as Sakunoshin Chikura
MovieUltraman Super Fighter Legend
1996
as Ultraseven / Ultraman Leo (voice)
MovieX
1996
as Shougo
MovieYawara! Atlanta Special
1996
MovieViolinist of Hamelin: The Movie
1996
as Raiel (voice)
TVB'T X
1996
as Quatro (voice)
TVThe Legend of Zorro
1996
as Don Diego de la Vega / Zorro
TVSpecial Duty Combat Unit Shinesman
1996
as Shujin Seki (voice)
MovieThe End of the Century Darling
1996
as Todorokki Kouhei (voice)
MovieBio Hunter
1995
as Komada
TVMobile Suit Gundam Wing
1995
as Duo Maxwell (voice)
TVUdauda Yatteru Hima wa Nee!
1995
as (voice)
MovieWild 7: Biker Knights
1994
as Dairoku Hiba
TVWild 7
1994
as Dairoku Hiba
TVThe Irresponsible Captain Tylor OVA
1994
as Dom (voice)
MovieI'm Not an Angel!
1994
as Bunta Kouno (voice)
MovieLove Wedge 2
1994
as Riki (voice)
MovieDorami-chan: A Blue Straw Hat
1994
as Crow (voice)
MovieGenocyber
1994
as Sakomizu (voice)
TVNatsuki Crisis
1994
as Kyōtarō Himuro
TVPlease Save My Earth
1993
as Mikuro Yakushimaru (voice)
TVBlack Jack
1993
as Tokio Umetani (voice)
TVAoki Densetsu Shoot!
1993
as Akihiko Himuro (voice)
MovieOcean Waves
1993
as Yutaka Matsuno (voice)
MovieSuikoden Demon Century
1993
as Takateru Suga (voice)
MovieKiss Me on the Apple of My Eye
1993
as Naoto (voice)
MovieNinja Scroll
1993
as Yurimaru (voice)
TVNinja Boy Rantaro
1993
as Hansuke Doi
TVThe Irresponsible Captain Tylor
1993
as Ru Baraba Dom
MovieDownload: Devil's Circuit
1992
as Sid (voice)
TVD-1 Devastator
1992
as 谷田辺了
MovieOruorane the Cat Player
1992
as The Cellist
MovieLove Wedge 1
1992
as Riki (voice)
TVAi no Kusabi
1992
as Riki (voice)
TVBastard!!
1992
MovieRanma 1/2 the Movie 2: Nihao My Concubine
1992
as Mousse (voice)
MovieYawara! Go Get 'Em, Wimpy Kids!!
1992
as (voice)
TVPrincess Army: Wedding Combat
1992
as Yuuya Hashiba
MovieCalico Cat Holmes and the Lord of the Haunted Castle
1992
as Yoshitaro Katayama (voice)
MovieThe Weathering Continent
1992
as Tieh (voice)
MovieMoonlight Pierce
1991
as Hiroshi Takama (voice)
TVNyūin Bokki Monogatari Ojiji ni!
1991
MovieInferious Interplanetary War Chronicle - Condition Green
1991
as Soo Laform (voice)
TVHere Is Greenwood
1991
as Shinobu Tezuka (voice)
MovieRanma 1/2 the Movie: Big Trouble in Nekonron, China
1991
as Mousse (voice)
MovieHandsome Girl
1991
as Ichiya Kumagai (voice)
TVIzumo
1991
as Izumo (voice)
TVLegend of Heavenly Sphere Shurato: The Secret Feud of Creation
1991
as Shurato
TVDetonator Orgun
1991
as Knock
MovieYuukan Club
1991
MovieNadia: The Secret of Blue Water - The Motion Picture
1991
as Falt (voice)
MovieNadia: The Secret of Blue Water - Nautilus Story II
1991
as Fate (voice)
MovieTrusty Ginjiro
1991
as Hideki Mitsui (voice)
MovieHisashi Eguchi's Kotobuki Goro Show
1991
as Piston Akagi (voice)
TVBlazing Transfer Student
1991
as Noboru Takizawa (voice)
TVAkai Hayate
1991
TVFuture GPX Cyber Formula
1991
as Jotaro Kaga
TVThe Hakkenden: Legend of the Dog Warriors
1990
as Shino Inuzuka (voice)
MovieTOKYO CITY Melhen 2
1990
MovieMarina the Manga Artist Goes to Camelot
1990
as Bijomaru Shizuka (voice)
MovieMidoriyama High School, Koshien Edition (Movie)
1990
MovieMilky Passion: Dougenzaka - The Castle of Love
1990
as Ootsuki (voice)
MovieGoddamn
1990
as Hans Schultz
TVGoddamn
1990
as Hans Schultz
TVNadia: The Secret of Blue Water
1990
as Fejto (voice)
MovieHeart-Coloured Killer Ticket
1990
as Chuta Misora (voice)
MovieRyokunohara Labyrinth - Sparkling Phantom
1990
as Hiroki Imashi
MovieDemon Hunter Makaryūdo
1989
as Shou Kurogane (voice)
TVYawara!
1989
as Matsuda / Eiji (voice)
TVDarkness of the Sea, Shadow of the Moon
1989
as Katsuyuki Touma (voice)
TVDash! Yonkuro
1989
MovieAngel Cop
1989
as Tachihara (voice)
MovieCinderella Express
1989
as Yuji Shimano
TVStar Cat Full House
1989
MovieScarlet Demon
1989
TVRanma ½
1989
as Mousse (voice)
TVMadö King Granzört
1989
as Grunwald
TVShurato
1989
as Shurato
TVNightsong of Splendor
1989
MovieHades Project: Zeorymer Extinction
1989
as Masato Akitsu / Masaki Kihara (voice)
MovieKaze wo Nuke!
1988
MovieHades Project: Zeorymer Separation
1988
as Masato Akitsu (voice)
TVHades Project Zeorymer
1988
as (voice)
TVArmor Hunter Merowlink
1988
as PFC Cepres
MovieDragon Century
1988
as Carmine (voice)
TVDragon Century
1988
as Carmine
MovieSunlight All Around! Ka - su - mi: You Were in My Dreams
1988
as Reporter B (voice)
MovieZillion: Burning Night
1988
as J.J. (voice)
TVSpirit Warrior
1988
as Kujaku (voice)
MovieBalthus: Tia's Radiance
1988
as Eud (voice)
TVF
1988
as Gunma Akagi (voice)
MovieThe Samurai
1987
as Takeshi Chimatsuri
MovieTO-Y
1987
as Shouji (voice)
TVZillion
1987
as JJ
MovieMaryuu Senki
1987
TVEvil Dragon War Chronicles
1987
as 錦繍 (voice)
MovieCampus Special Investigator Hikaruon
1987
as Hikaru Shihodo / Hikaruon (voice)
MovieCastle in the Sky
1986
as Additional Voices (voice)
MovieCall Me Tonight
1986
as Hayata (voice)
TVMagical Emi, the Magic Star
1985
as Customer A (voice)
TVKamen Rider
1971
as Kamen Rider Den-O (voice)
MovieSuper Space Sheriff Gavan Infinity
as Gavarion Trigger / Cosmo Gavarion (voice), Supreme Chancellor
