ACTOR
Toshihiko Seki
Known for Naruto Shippūden · Demon Slayer: Kimetsu no Yaiba · Naruto
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…
Snapshot 2026-10-15
- Born
- Jun 11, 1962
- Birthplace
- Sendai, Japon
- Known For
- Acting
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.
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Known For
TV
Naruto ShippūdenIruka Umino (voice) · 2007
★ 8.5
★ 8.5
TV
Demon Slayer: Kimetsu no YaibaMuzan Kibutsuji (voice) · 2019
★ 8.6
★ 8.6
TV
NarutoIruka Umino (voice) · 2002
★ 8.4
★ 8.4
TV
BleachAaroniero Arruruerie (voice) · 2004
★ 8.4
★ 8.4
MOVIE
Demon Slayer: Kimetsu no Yaiba Infinity CastleMuzan Kibutsuji (voice) · 2025
★ 8.8
★ 8.8
TV
Hunter x HunterWing (voice) · 2011
★ 8.7
★ 8.7
TV
Ranma ½Mousse (voice) · 1989
★ 8.6
★ 8.6
TV
Mob Psycho 100Morizo Ebihara (voice) · 2016
★ 8.5
★ 8.5
Filmography
Movies
Call Me TonightHayata (voice)
1986
Castle in the Sky(voice)
1986
Campus Special Investigator HikaruonHikaru Shihodo / Hikaruon (voice)
1987
Maryuu Senki
1987
The SamuraiTakeshi Chimatsuri
1987
TO-YShouji (voice)
1987
Balthus: Tia's RadianceEud (voice)
1988
Dragon CenturyCarmine (voice)
1988
Hades Project: Zeorymer SeparationMasaki Kihara (voice)
1988Hades Project: Zeorymer SeparationMasato Akitsu (voice)
1988
Kaze wo Nuke!
1988
Sunlight All Around! Ka - su - mi: You Were in My DreamsReporter B (voice)
1988
Zillion: Burning NightJ.J. (voice)
1988
Angel CopTachihara (voice)
1989
Cinderella ExpressYuji Shimano
1989
Demon Hunter MakaryūdoShou Kurogane (voice)
1989
Hades Project: Zeorymer ExtinctionMasato Akitsu / Masaki Kihara (voice)
1989
Scarlet Demon
1989
GoddamnHans Schultz
1990
Heart-Coloured Killer TicketChuta Misora (voice)
1990
Marina the Manga Artist Goes to CamelotBijomaru Shizuka (voice)
1990
Midoriyama High School, Koshien Edition (Movie)
1990
Milky Passion: Dougenzaka - The Castle of LoveOotsuki (voice)
1990
Ryokunohara Labyrinth - Sparkling PhantomHiroki Imashi
1990
TOKYO CITY Melhen 2
1990
Handsome GirlIchiya Kumagai (voice)
1991
Hisashi Eguchi's Kotobuki Goro ShowPiston Akagi (voice)
1991
Inferious Interplanetary War Chronicle - Condition GreenSoo Laform (voice)
1991
Moonlight PierceHiroshi Takama (voice)
1991
Nadia: The Secret of Blue Water - Nautilus Story IIFate (voice)
1991
Nadia: The Secret of Blue Water - The Motion PictureFalt (voice)
1991
Ranma 1/2 the Movie: Big Trouble in Nekonron, ChinaMousse (voice)
1991
Trusty GinjiroHideki Mitsui (voice)
1991
Yuukan Club
1991
Calico Cat Holmes and the Lord of the Haunted CastleYoshitaro Katayama (voice)
1992
Download: Devil's CircuitSid (voice)
1992
Love Wedge 1Riki (voice)
1992
Oruorane the Cat PlayerThe Cellist
1992
Ranma 1/2 the Movie 2: Nihao My ConcubineMousse (voice)
1992
The Weathering ContinentTieh (voice)
1992
Yawara! Go Get 'Em, Wimpy Kids!!(voice)
1992
Kiss Me on the Apple of My EyeNaoto (voice)
1993
Ninja ScrollYurimaru (voice)
1993
Ocean WavesYutaka Matsuno (voice)
1993
Suikoden Demon CenturyTakateru Suga (voice)
1993
Dorami-chan: A Blue Straw HatCrow (voice)
1994
GenocyberSakomizu (voice)
1994
I'm Not an Angel!Bunta Kouno (voice)
1994
Love Wedge 2Riki (voice)
1994
The Irresponsible Captain Tylor: Tylor's WarRu Baraba Dom (voice)
1994
Wild 7: Biker KnightsDairoku Hiba
1994
Bio HunterKomada
1995
The End of the Century DarlingTodorokki Kouhei (voice)
1996
Ultraman Super Fighter LegendUltraseven / Ultraman Leo (voice)
1996
Violinist of Hamelin: The MovieRaiel (voice)
1996
XShougo
1996
Yawara! Atlanta Special
1996
Chimera: Angel of DeathRon (voice)
1997
Twilight of the Dark MasterShijo Tsunami (voice)
1997
Gundam Wing: The Endless WaltzDuo Maxwell (voice)
1998
Baby Felix & FriendsFelix The Cat
2000
Reign: The Conqueror MovieAlexander
2000
Saiyuki: RequiemGenjo Sanzo (voice)
2001
Animation Store ManagerRyuu Raiba (voice)
2002
Saiyuki Interactive
2002
Paranoia Agent: Part 1まにわ みつひろ
2004
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!Momotaros (voice)
2007
Kamen Rider Den-O The Movie: I'm Born!Momotaros (voice)
2007
Kamen Rider Den-O: Final StageMomotaros
2007
Kamen Rider Den-O: Singing, Dancing, Great Training!!Momotaros (voice)
2007
Momotaros' Summer VacationMomotaros (voice)
2007
Farewell Kamen Rider Den-O: Final CountdownMomotaros (voice)
2008
Imagin Anime: Momotaros Forever!/Imajin Terminal StationMomotaros (voice)
2008
Kamen Rider Den-O & Kiva: Climax DekaMomotaros (voice)
2008Kamen Rider Den-O & Kiva: Climax DekaTheme Song Performance
2008
Kamen Rider Den-O: Final Trilogy Special EditionMomotaros (voice)
2008
Kamen Rider Kiva: King of the Castle in the Demon WorldPenetentiary Officer Sanjo
2008
Momotaros' King of the Crimson CastleMomotaros (voice)
2008
10th Anniversary Project: Masked Rider LIVE & SHOWKamen Rider Den-O Sword Form (voice)
2009
Kamen Rider Decade: All Riders vs. Dai-ShockerMomotaros / Kamen Rider Den-O (voice)
2009
Kamen Rider Kiva & Den-O: DenLiner, Into Space!Momotaros (voice)
2009
Kamen Rider × Kamen Rider W & Decade: Movie War 2010Kamen Rider Den-O (voice)
2009
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-Momotaros (voice)
2009
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima WarshipMomotaros (voice)
2009Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima WarshipTheme Song Performance
2009
Kamen Rider Decade: Final StageMomotaros / Kamen Rider Den-O (Sword Form)
2010
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is NewtralMomotaros (voice)
2010
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star TwinkleMomotaros (voice)
2010
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End PiratesMomotaros (voice)
2010
Detective Conan: Quarter of SilenceShogo Hikawa (voice)
2011
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!Hansuke Doi (voice)
2011
OOO, Den-O, All Riders: Let's Go Kamen RidersMomotaros / Kamen Rider Den-O Sword Form (voice)
2011
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~Momotaros (voice)
2011
Kamen Rider × Super Sentai: Super Hero WarsMomotaros - Kamen Rider Den-O Sword Form (voice)
2012
Road to Ninja: Naruto the MovieIruka Umino (voice)
2012
Higurashi: When They Cry - OutbreakKyousuke Irie (voice)
2013
Hunter x Hunter: The Last MissionWing (voice)
2013
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super SentaiKamen Rider Den-O Sword Form (voice)
2014
Mobile Suit Gundam: The Origin II – Artesia's SorrowChar Aznable (voice)
2015
Naruto OVA 12: The Day Naruto Became HokageIruka Umino (voice)
2016
Kamen Rider × Super Sentai: Ultra Super Hero WarsMomotaros - Kamen Rider Den-O Sword Form (voice)
2017
Mazinger Z: InfinityTetsuya Tsurugi (voice)
2017
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-Momotaros
2017
Kamen Rider Heisei Generations ForeverMomotaros / Kamen Rider Den-O Sword Form (voice)
2018
Demon Slayer: Kimetsu no Yaiba - Sibling's BondMuzan Kibutsuji (voice)
2019
Kamen Rider Den-O: The Birth of Pretty Den-O!Momotaros (voice)
2020
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero ChroniclesMomotaros (voice) / Kamen Rider Den-O (voice)
2021
My Hero Academia: World Heroes' MissionEddie Soul (voice)
2021
Demon Slayer: Kimetsu no Yaiba - Asakusa ArcMuzan Kibutsuji (voice)
2022
Black Clover: Sword of the Wizard KingConrad Leto (voice)
2023
The Birth of Kitaro: The Mystery of GeGeGeKitarou's Father (voice)
2023
Nintama Rantarō: Invincible Master of the Dokutake NinjaHansuke Doi (voice)
2024
Demon Slayer: Kimetsu no Yaiba Infinity CastleMuzan Kibutsuji (voice)
2025
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita HiCosmo Gavarion System Voice / Gavarion Trigger System Voice
2026
Super Space Sheriff Gavan Infinity: Jo-Chaku CourseGavarion Trigger System Voice (voice)
2026Television
Kamen RiderKamen Rider Den-O (voice) · 2 eps
1971Kamen RiderMomotaros (voice) · 54 eps
1971
Magical Emi, the Magic StarCustomer A (voice) · 1 eps
1985
Musashi no KenMale member (voice) · 1 eps
1985
Evil Dragon War Chronicles錦繍 (voice) · 2 eps
1987
ZillionJJ · 31 eps
1987
Armor Hunter MerowlinkPFC Cepres · 1 eps
1988
Dragon CenturyCarmine · 2 eps
1988
FGunma Akagi (voice) · 31 eps
1988
Hades Project Zeorymer(voice) · 4 eps
1988
Spirit WarriorKujaku (voice) · 3 eps
1988
Darkness of the Sea, Shadow of the MoonKatsuyuki Touma (voice) · 3 eps
1989
Dash! Yonkuro25 eps
1989
Madö King GranzörtGrunwald · 41 eps
1989
Nightsong of Splendor4 eps
1989
Ranma ½Mousse (voice) · 13 eps
1989
ShuratoShurato · 38 eps
1989
Star Cat Full House4 eps
1989
Yawara!Matsuda / Eiji (voice) · 124 eps
1989
GoddamnHans Schultz · 2 eps
1990
Nadia: The Secret of Blue WaterFejto (voice) · 39 eps
1990
The Hakkenden: Legend of the Dog WarriorsShino Inuzuka (voice) · 13 eps
1990
Akai Hayate4 eps
1991
Blazing Transfer StudentNoboru Takizawa (voice) · 2 eps
1991
Detonator OrgunKnock · 3 eps
1991
Flaming Rugby Boy: Dodge DanpeiNikaidou · 47 eps
1991
Future GPX Cyber FormulaJotaro Kaga · 64 eps
1991
Here Is GreenwoodShinobu Tezuka (voice) · 6 eps
1991
IzumoIzumo (voice) · 2 eps
1991
Legend of Heavenly Sphere Shurato: The Secret Feud of CreationShurato · 6 eps
1991
Nyūin Bokki Monogatari Ojiji ni!2 eps
1991
Ai no KusabiRiki (voice) · 2 eps
1992
Bastard!!6 eps
1992
D-1 Devastator谷田辺了 · 2 eps
1992
Princess Army: Wedding CombatYuuya Hashiba · 2 eps
1992
Aoki Densetsu Shoot!Akihiko Himuro (voice) · 58 eps
1993
Black JackTokio Umetani (voice) · 1 eps
1993
Ninja Boy RantaroHansuke Doi · 702 eps
1993
Please Save My EarthMikuro Yakushimaru (voice) · 6 eps
1993
The Irresponsible Captain TylorRu Baraba Dom · 26 eps
1993
Natsuki CrisisKyōtarō Himuro · 2 eps
1994
The Irresponsible Captain Tylor OVADom (voice) · 10 eps
1994
Wild 7Dairoku Hiba · 2 eps
1994
Mobile Suit Gundam WingDuo Maxwell (voice) · 49 eps
1995
Udauda Yatteru Hima wa Nee!(voice) · 2 eps
1995
B'T XQuatro (voice) · 14 eps
1996
Special Duty Combat Unit ShinesmanShujin Seki (voice) · 2 eps
1996
The Legend of ZorroDon Diego de la Vega / Zorro · 52 eps
1996
DragoonRain Keeves Fearudo (voice) · 3 eps
1997
Hakugei: Legend of the Moby Dick26 eps
1997
Hyper PoliceSakunoshin Chikura · 25 eps
1997
Bomberman B-Daman Bakugaiden48 eps
1998
Nightwalker: The Midnight DetectiveBait · 12 eps
1998
Outlaw StarFred (voice) · 26 eps
1998
TRIGUNLegato Bluesummers (voice) · 7 eps
1998
Bビーダマン爆外伝VKurobon · 50 eps
1999
Harlock Saga - The Ring of the Nibelungs6 eps
1999
Pet Shop of HorrorsCount D (voice) · 4 eps
1999
Reign: The ConquerorAlexander (voice) · 13 eps
1999
Descendants of DarknessYutaka Watari (voice) · 13 eps
2000
SaiyukiGenjo Sanzo (voice) · 126 eps
2000SaiyukiKonzen Douji (voice) · 50 eps
2000
Angelique: Twin CollectionLuva (voice) · 8 eps
2002Angelique: Twin CollectionTheme Song Performance
2002
Mirage of BlazeTakaya Ohgi (voice) · 13 eps
2002
Mobile Suit Gundam SEEDRau Le Creuset (voice) · 56 eps
2002Mobile Suit Gundam SEEDRey Za Burrel (voice) · 50 eps
2002
NarutoIruka Umino (voice) · 220 eps
2002
Saint Seiya: The Hades ChapterMilo (voice) · 10 eps
2002
Requiem from the DarknessMomosuke Yamaoka (voice) · 13 eps
2003
BleachAaroniero Arruruerie (voice)
2004
Gin'yuu Mokushiroku Meine LiebeLudwig Herzog von Mohn nahe Liechtenstein (voice) · 26 eps
2004
My-HimeReito Kanzaki (voice) · 26 eps
2004
Paranoia AgentMitsuhiro Maniwa (voice) · 13 eps
2004
Samurai ChamplooYamane (voice) · 26 eps
2004
My-OtomeRad (voice) · 26 eps
2005
MÄR: Märchen Awakens RomanceDanna Toramizu · 102 eps
2005
Higurashi: When They CryKyousuke Irie (voice) · 10 eps
2006
Loving Angel AngeliqueLuva
2006
Shonen Onmyouji26 eps
2006
Kamen Rider Den-OMomotaros (voice) · 49 eps
2007
Naruto ShippūdenIruka Umino (voice) · 320 eps
2007
Saiyuki Reload: BurialGenjō Sanzō (voice) · 3 eps
2007
A Certain Magical IndexAleister Crowley (voice) · 9 eps
2008
Blade of the ImmortalSouri (voice) · 2 eps
2008
Kamen Rider Den-O: Imagin AnimeMomotaros (voice) · 34 eps
2008Momotaros' King of the Crimson CastleMomotaros (voice) · 4 eps
2008
SekireiHiroto Minaka · 25 eps
2008
Cookin' Idol Ai! Mai! Main!柊修 · 25 eps
2009
Dogs: Bullets & CarnageErnst Rammsteiner · 4 eps
2009
KatanagatariUmigame Maniwa (voice) · 12 eps
2010
Psychic Detective YakumoIsshin Saitō · 13 eps
2010
Guilty CrownKurosu Ouma (voice) · 1 eps
2011
Hunter x HunterWing (voice) · 10 eps
2011
Mobile Suit Gundam SEED HD RemasterRey Za Burrel (voice), Rau Le Creuset (voice) · 98 eps
2011
Saiyuki GaidenKonzen Dōji (voice) · 4 eps
2011
Glitter ForceHiroshi Hoshizora · 48 eps
2012
Gingitsune: Messenger Fox of the GodsTatsuo Saeki (voice) · 12 eps
2013
Triple Combination: Transformers Go!Gekisōmaru (voice) · 10 eps
2013
声優戦隊ボイストーム7(voice) · 11 eps
2013
Cross Ange: Rondo of Angels and DragonsEmbryo (voice) · 25 eps
2014
Space DandyPublic Prosecutor (voice) · 1 eps
2014
Saint Seiya: Soul of GoldScorpio Milo (voice) · 13 eps
2015
Descending StoriesEisuke Higuchi (voice) · 25 eps
2016
Mob Psycho 100Morizo Ebihara (voice) · 1 eps
2016Mob Psycho 100Musashi Goda (voice) · 14 eps
2016
To Be HeroChinese Tohoku Muffler (voice) · 12 eps
2016
The Laughing Salesman NEWShisao Kihara(Story2) · 12 eps
2017
THE REFLECTIONMichael Holden (voice) · 12 eps
2017
Golden KamuyKazuo Henmi (voice) · 62 eps
2018
Saint Seiya: Saintia ShoScorpio Milo (voice) · 10 eps
2018
SWORD GAI: The AnimationMiura Takuma · 12 eps
2018
The Ryuo's Work is Never Done!Kiyotaki Kousuke (voice) · 12 eps
2018
Ascendance of a BookwormEustachius (voice) · 7 eps
2019
Demon Slayer: Kimetsu no YaibaMuzan Kibutsuji (voice) · 13 eps
2019
SAINT SEIYA: Knights of the ZodiacScorpio Milo (voice) · 1 eps
2019
SarazanmaiYuri Kamome · 1 eps
2019
Star☆Twinkle PreCureToto Hagoromo (voice) · 3 eps
2019
Higurashi: When They Cry - NEWKyousuke Irie (voice) · 39 eps
2020
The Misfit of Demon King AcademyAhide Alobo Agatze (voice) · 6 eps
2020
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-OMomotaros (voice) · 3 eps
2022
HIGH CARDNorman Kingstat (voice) · 12 eps
2023
OnimushaKojiro Sasaki (voice) · 8 eps
2023
PLUTOSahad (voice) · 1 eps
2023PLUTOPluto (voice) · 3 eps
2023
Rurouni KenshinNarration (voice) · 21 eps
2023
The Most Heretical Last Boss Queen: From Villainess to SaviorClark Darwin (voice) · 12 eps
2023
Good Bye, Dragon LifeDio (voice) · 3 eps
2024
I Parry EverythingCarew (voice) · 12 eps
2024
Kaiju No. 8Kaiju No. 11 (voice) · 1 eps
2024
Ranma1/2Mousse (voice) · 4 eps
2024
I Have a Crush at WorkPastor (voice) · 1 eps
2025
Mashin Creator WataruMr. Liar (voice) · 2 eps
2025
SANDAHifumi Ōshibu (voice) · 12 eps
2025
U Takes TerraChongyue (Voice) · 1 eps
2025
My Ribdiculous Reincarnation12 eps
2026
PROJECT R.E.D.GavarionTrigger / CosmoGavarion (voice) · 23 eps
2026Photos
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