Personal Info
Known For
Acting
Born
June 11, 1962 (age 64)
Place of Birth
Sendai, Japon
Also Known As
せき としひこ
关俊彦
関 俊彦
Toshihiko Seki
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.
seki toshihiko voice acting roles
VideoKnown For
Film
Demon Slayer: Kimetsu no Yaiba Infinity Castle
Muzan Kibutsuji (voice)
2025
TV
Kamen Rider
Kamen Rider Den-O (voice)
1971
TV
Kamen Rider
Momotaros (voice)
1971
TV
Ranma1/2
Mousse (voice)
2024
TV
Ninja Boy Rantaro
Hansuke Doi
1993
TV
Bleach
Aaroniero Arruruerie (voice)
2004
TV
Hunter x Hunter
Wing (voice)
2011
TV
Naruto
Iruka Umino (voice)
2002
TV
Naruto Shippūden
Iruka Umino (voice)
2007
TV
Ranma ½
Mousse (voice)
1989
TV
Rurouni Kenshin
Narration (voice)
2023
TV
Mob Psycho 100
Morizo Ebihara (voice)
2016
TV
Mob Psycho 100
Musashi Goda (voice)
2016
TV
Kaiju No. 8
Kaiju No. 11 (voice)
2024
TV
Sekirei
Hiroto Minaka
2008
TV
Ascendance of a Bookworm
Eustachius (voice)
2019
TV
Mobile Suit Gundam SEED
Rau Le Creuset (voice)
2002
TV
Mobile Suit Gundam SEED
Rey Za Burrel (voice)
2002
TV
The Misfit of Demon King Academy
Ahide Alobo Agatze (voice)
2020
TV
Saint Seiya: The Hades Chapter
Milo (voice)
2002
Filmography
2026FilmChō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hias Cosmo Gavarion System Voice / Gavarion Trigger System Voice2026TVMy Ribdiculous Reincarnation2026FilmSuper Space Sheriff Gavan Infinity: Jo-Chaku Courseas Gavarion Trigger System Voice (voice)2026TVPROJECT R.E.D.as GavarionTrigger / CosmoGavarion (voice)2025TVSANDAas Hifumi Ōshibu (voice)2025FilmDemon Slayer: Kimetsu no Yaiba Infinity Castleas Muzan Kibutsuji (voice)2025TVU Takes Terraas Chongyue (Voice)2025TVMashin Creator Wataruas Mr. Liar (voice)2025TVI Have a Crush at Workas Pastor (voice)2024FilmNintama Rantarō: Invincible Master of the Dokutake Ninjaas Hansuke Doi (voice)2024TVGood Bye, Dragon Lifeas Dio (voice)2024TVRanma1/2as Mousse (voice)2024TVI Parry Everythingas Carew (voice)2024TVKaiju No. 8as Kaiju No. 11 (voice)2023FilmThe Birth of Kitaro: The Mystery of GeGeGeas Kitarou's Father (voice)2023TVOnimushaas Kojiro Sasaki (voice)2023TVPLUTOas Sahad (voice)2023TVThe Most Heretical Last Boss Queen: From Villainess to Savioras Clark Darwin (voice)2023TVRurouni Kenshinas Narration (voice)2023FilmBlack Clover: Sword of the Wizard Kingas Conrad Leto (voice)2023TVHIGH CARDas Norman Kingstat (voice)2022FilmDemon Slayer: Kimetsu no Yaiba - Asakusa Arcas Muzan Kibutsuji (voice)2022TVAvataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-Oas Momotaros (voice)2021FilmMy Hero Academia: World Heroes' Missionas Eddie Soul (voice)2021FilmKamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chroniclesas Momotaros (voice) / Kamen Rider Den-O (voice)2020TVHigurashi: When They Cry - NEWas Kyousuke Irie (voice)2020FilmKamen Rider Den-O: The Birth of Pretty Den-O!as Momotaros (voice)2020TVThe Misfit of Demon King Academyas Ahide Alobo Agatze (voice)2019TVAscendance of a Bookwormas Eustachius (voice)2019TVSAINT SEIYA: Knights of the Zodiacas Scorpio Milo (voice)2019TVSarazanmaias Yuri Kamome2019TVDemon Slayer: Kimetsu no Yaibaas Muzan Kibutsuji (voice)2019FilmDemon Slayer: Kimetsu no Yaiba - Sibling's Bondas Muzan Kibutsuji (voice)2019TVStar☆Twinkle PreCureas Toto Hagoromo (voice)2018FilmKamen Rider Heisei Generations Foreveras Momotaros / Kamen Rider Den-O Sword Form (voice)2018TVSaint Seiya: Saintia Shoas Scorpio Milo (voice)2018TVGolden Kamuyas Kazuo Henmi (voice)2018TVSWORD GAI: The Animationas Miura Takuma2018TVThe Ryuo's Work is Never Done!as Kiyotaki Kousuke (voice)2017FilmMazinger Z: Infinityas Tetsuya Tsurugi (voice)2017FilmSaraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-as Momotaros2017TVTHE REFLECTIONas Michael Holden (voice)2017TVThe Laughing Salesman NEWas Shisao Kihara(Story2)2017FilmKamen Rider × Super Sentai: Ultra Super Hero Warsas Momotaros - Kamen Rider Den-O Sword Form (voice)2016TVTo Be Heroas Chinese Tohoku Muffler (voice)2016TVMob Psycho 100as Morizo Ebihara (voice)2016FilmNaruto OVA 12: The Day Naruto Became Hokageas Iruka Umino (voice)2016TVDescending Storiesas Eisuke Higuchi (voice)2015FilmMobile Suit Gundam: The Origin II - Artesia's Sorrowas Char Aznable (voice)2015TVSaint Seiya: Soul of Goldas Scorpio Milo (voice)2014TVCross Ange: Rondo of Angels and Dragonsas Embryo (voice)2014FilmHeisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentaias Kamen Rider Den-O Sword Form (voice)2014TVSpace Dandyas Public Prosecutor (voice)2013FilmHunter x Hunter: The Last Missionas Wing (voice)2013TVGingitsune: Messenger Fox of the Godsas Tatsuo Saeki (voice)2013TV声優戦隊ボイストーム7as (voice)2013FilmHigurashi: When They Cry - Outbreakas Kyousuke Irie (voice)2013TVTriple Combination: Transformers Go!as Gekisōmaru (voice)2012FilmRoad to Ninja: Naruto the Movieas Iruka Umino (voice)2012FilmKamen Rider × Super Sentai: Super Hero Warsas Momotaros - Kamen Rider Den-O Sword Form (voice)2012TVGlitter Forceas Hiroshi Hoshizora2011TVGuilty Crownas Kurosu Ouma (voice)2011TVHunter x Hunteras Wing (voice)2011FilmDetective Conan: Quarter of Silenceas Shogo Hikawa (voice)2011FilmOOO, Den-O, All Riders: Let's Go Kamen Ridersas Momotaros / Kamen Rider Den-O Sword Form (voice)2011TVSaiyuki Gaidenas Konzen Dōji (voice)2011FilmNintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!as Hansuke Doi (voice)2011FilmOOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~as Momotaros (voice)2010TVPsychic Detective Yakumoas Isshin Saitō2010FilmKamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 20102010FilmSuper Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Piratesas Momotaros (voice)2010FilmSuper Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtralas Momotaros (voice)2010FilmSuper Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkleas Momotaros (voice)2010TVKatanagatarias Umigame Maniwa (voice)2010FilmKamen Rider Decade: Final Stageas Momotaros / Kamen Rider Den-O (Sword Form)2009FilmKamen Rider × Kamen Rider W & Decade: Movie War 2010as Kamen Rider Den-O (voice)2009Film10th Anniversary Project: Masked Rider LIVE & SHOWas Kamen Rider Den-O Sword Form (voice)2009FilmKamen Rider Decade: All Riders vs. Dai-Shockeras Momotaros / Kamen Rider Den-O (voice)2009TVDogs: Bullets & Carnageas Ernst Rammsteiner2009FilmSuper Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warshipas Momotaros (voice)2009TVCookin' Idol Ai! Mai! Main!as 柊修2009FilmSaraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-as Momotaros (voice)2009FilmKamen Rider Kiva & Den-O: DenLiner, Into Space!as Momotaros (voice)2008FilmImagin Anime: Momotaros Forever!/Imajin Terminal Stationas Momotaros (voice)2008TVA Certain Magical Indexas Aleister Crowley (voice)2008FilmFarewell Kamen Rider Den-O: Final Countdownas Momotaros (voice)2008FilmKamen Rider Kiva: King of the Castle in the Demon Worldas Penetentiary Officer Sanjo2008FilmMomotaros' King of the Crimson Castleas Momotaros (voice)2008FilmKamen Rider Den-O: Final Trilogy Special Editionas Momotaros (voice)2008TVMomotaros' King of the Crimson Castleas Momotaros (voice)2008TVBlade of the Immortalas Souri (voice)2008TVSekireias Hiroto Minaka2008TVKamen Rider Den-O: Imagin Animeas Momotaros (voice)2008FilmKamen Rider Den-O & Kiva: Climax Dekaas Momotaros (voice)2007FilmKamen Rider Den-O: Final Stageas Momotaros2007FilmKamen Rider Den-O: Singing, Dancing, Great Training!!as Momotaros (voice)2007FilmKamen Rider Den-O The Movie: I'm Born!as Momotaros (voice)2007FilmCrayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!as Momotaros (voice)2007FilmMomotaros' Summer Vacationas Momotaros (voice)2007TVSaiyuki Reload: Burialas Genjō Sanzō (voice)2007TVNaruto Shippūdenas Iruka Umino (voice)2007TVKamen Rider Den-Oas Momotaros (voice)2006TVShonen Onmyouji2006TVLoving Angel Angeliqueas Luva2006TVHigurashi: When They Cryas Kyousuke Irie (voice)2005TVMy-Otomeas Rad (voice)2005TVMÄR: Märchen Awakens Romanceas Danna Toramizu2004TVGin'yuu Mokushiroku Meine Liebeas Ludwig Herzog von Mohn nahe Liechtenstein (voice)2004TVBleachas Aaroniero Arruruerie (voice)2004TVMy-Himeas Reito Kanzaki (voice)2004TVSamurai Champlooas Yamane (voice)2004TVParanoia Agentas Mitsuhiro Maniwa (voice)2004FilmParanoia Agent: Part 1as まにわ みつひろ2003TVRequiem from the Darknessas Momosuke Yamaoka (voice)2002TVSaint Seiya: The Hades Chapteras Milo (voice)2002TVMobile Suit Gundam SEEDas Rau Le Creuset (voice)2002TVNarutoas Iruka Umino (voice)2002FilmSaiyuki Interactive2002FilmAnimation Store Manageras Ryuu Raiba (voice)2002TVAngelique: Twin Collectionas Luva (voice)2002TVMirage of Blazeas Takaya Ohgi (voice)2001FilmSaiyuki: Requiemas Genjo Sanzo (voice)2000FilmReign: The Conqueror Movieas Alexander2000TVDescendants of Darknessas Yutaka Watari (voice)2000TVSaiyukias Genjo Sanzo (voice)2000FilmBaby Felix & Friendsas Felix The Cat1999TVReign: The Conqueroras Alexander (voice)1999TVPet Shop of Horrorsas Count D (voice)1999TVBビーダマン爆外伝Vas Kurobon1999TVHarlock Saga - The Ring of the Nibelungs1998FilmGundam Wing: The Endless Waltzas Duo Maxwell (voice)1998TVNightwalker: The Midnight Detectiveas Bait1998TVTRIGUNas Legato Bluesummers (voice)1998TVBomberman B-Daman Bakugaiden1998TVOutlaw Staras Fred (voice)1997FilmTwilight of the Dark Masteras Shijo Tsunami (voice)1997FilmChimera: Angel of Deathas Ron1997TVDragoonas Rain Keeves Fearudo (voice)1997TVHakugei: Legend of the Moby Dick1997TVHyper Policeas Sakunoshin Chikura1996FilmUltraman Super Fighter Legendas Ultraseven / Ultraman Leo (voice)1996FilmXas Shougo1996FilmYawara! Atlanta Special1996FilmViolinist of Hamelin: The Movieas Raiel (voice)1996TVB'T Xas Quatro (voice)1996TVThe Legend of Zorroas Don Diego de la Vega / Zorro1996TVSpecial Duty Combat Unit Shinesmanas Shujin Seki (voice)1996FilmThe End of the Century Darlingas Todorokki Kouhei (voice)1995FilmBio Hunteras Komada1995TVMobile Suit Gundam Wingas Duo Maxwell (voice)1995TVUdauda Yatteru Hima wa Nee!as (voice)1994FilmWild 7: Biker Knightsas Dairoku Hiba1994TVWild 7as Dairoku Hiba1994TVThe Irresponsible Captain Tylor OVAas Dom (voice)1994FilmI'm Not an Angel!as Bunta Kouno (voice)1994FilmLove Wedge 2as Riki (voice)1994FilmDorami-chan: A Blue Straw Hatas Crow (voice)1994FilmGenocyberas Sakomizu (voice)1994TVNatsuki Crisisas Kyōtarō Himuro1993TVPlease Save My Earthas Mikuro Yakushimaru (voice)1993TVBlack Jackas Tokio Umetani (voice)1993TVAoki Densetsu Shoot!as Akihiko Himuro (voice)1993FilmOcean Wavesas Yutaka Matsuno (voice)1993FilmSuikoden Demon Centuryas Takateru Suga (voice)1993FilmKiss Me on the Apple of My Eyeas Naoto (voice)1993FilmNinja Scrollas Yurimaru (voice)1993TVNinja Boy Rantaroas Hansuke Doi1993TVThe Irresponsible Captain Tyloras Ru Baraba Dom1992FilmDownload: Devil's Circuitas Sid (voice)1992TVD-1 Devastatoras 谷田辺了1992FilmOruorane the Cat Playeras The Cellist1992FilmLove Wedge 1as Riki (voice)1992TVAi no Kusabias Riki (voice)1992TVBastard!!1992FilmRanma 1/2 the Movie 2: Nihao My Concubineas Mousse (voice)1992FilmYawara! Go Get 'Em, Wimpy Kids!!as (voice)1992TVPrincess Army: Wedding Combatas Yuuya Hashiba1992FilmCalico Cat Holmes and the Lord of the Haunted Castleas Yoshitaro Katayama (voice)1992FilmThe Weathering Continentas Tieh (voice)1991FilmMoonlight Pierceas Hiroshi Takama (voice)1991TVNyūin Bokki Monogatari Ojiji ni!1991FilmInferious Interplanetary War Chronicle - Condition Greenas Soo Laform (voice)1991TVHere Is Greenwoodas Shinobu Tezuka (voice)1991FilmRanma 1/2 the Movie: Big Trouble in Nekonron, Chinaas Mousse (voice)1991FilmHandsome Girlas Ichiya Kumagai (voice)1991TVIzumoas Izumo (voice)1991TVLegend of Heavenly Sphere Shurato: The Secret Feud of Creationas Shurato1991TVDetonator Orgunas Knock1991FilmYuukan Club1991FilmNadia: The Secret of Blue Water - The Motion Pictureas Falt (voice)1991FilmNadia: The Secret of Blue Water - Nautilus Story IIas Fate (voice)1991FilmTrusty Ginjiroas Hideki Mitsui (voice)1991FilmHisashi Eguchi's Kotobuki Goro Showas Piston Akagi (voice)1991TVBlazing Transfer Studentas Noboru Takizawa (voice)1991TVAkai Hayate1991TVFuture GPX Cyber Formulaas Jotaro Kaga1990TVThe Hakkenden: Legend of the Dog Warriorsas Shino Inuzuka (voice)1990FilmTOKYO CITY Melhen 21990FilmMarina the Manga Artist Goes to Camelotas Bijomaru Shizuka (voice)1990FilmMidoriyama High School, Koshien Edition (Movie)1990FilmMilky Passion: Dougenzaka - The Castle of Loveas Ootsuki (voice)1990FilmGoddamnas Hans Schultz1990TVGoddamnas Hans Schultz1990TVNadia: The Secret of Blue Wateras Fejto (voice)1990FilmHeart-Coloured Killer Ticketas Chuta Misora (voice)1990FilmRyokunohara Labyrinth - Sparkling Phantomas Hiroki Imashi1989FilmDemon Hunter Makaryūdoas Shou Kurogane (voice)1989TVYawara!as Matsuda / Eiji (voice)1989TVDarkness of the Sea, Shadow of the Moonas Katsuyuki Touma (voice)1989TVDash! Yonkuro1989FilmAngel Copas Tachihara (voice)1989FilmCinderella Expressas Yuji Shimano1989TVStar Cat Full House1989FilmScarlet Demon1989TVRanma ½as Mousse (voice)1989TVMadö King Granzörtas Grunwald1989TVShuratoas Shurato1989TVNightsong of Splendor1989FilmHades Project: Zeorymer Extinctionas Masato Akitsu / Masaki Kihara (voice)1988FilmKaze wo Nuke!1988FilmHades Project: Zeorymer Separationas Masaki Kihara (voice)1988TVHades Project Zeorymeras (voice)1988TVArmor Hunter Merowlinkas PFC Cepres1988FilmDragon Centuryas Carmine (voice)1988TVDragon Centuryas Carmine1988FilmSunlight All Around! Ka - su - mi: You Were in My Dreamsas Reporter B (voice)1988FilmZillion: Burning Nightas J.J. (voice)1988TVSpirit Warrioras Kujaku (voice)1988FilmBalthus: Tia's Radianceas Eud (voice)1988TVFas Gunma Akagi (voice)1987FilmThe Samuraias Takeshi Chimatsuri1987FilmTO-Yas Shouji (voice)1987TVZillionas JJ1987FilmMaryuu Senki1987TVEvil Dragon War Chroniclesas 錦繍 (voice)1987FilmCampus Special Investigator Hikaruonas Hikaru Shihodo / Hikaruon (voice)1986FilmCastle in the Skyas Additional Voices (voice)1986FilmCall Me Tonightas Hayata (voice)1985TVMagical Emi, the Magic Staras Customer A (voice)1971TVKamen Rideras Kamen Rider Den-O (voice)—FilmSuper Space Sheriff Gavan Infinityas Gavarion Trigger / Cosmo Gavarion (voice), Supreme Chancellor