Toshihiko Seki
Known for Acting · 238 credits
- Born
- 1962-06-11 (age 63)
- Place of birth
- Sendai, Japon
- Also known as
- せき としひこ · 关俊彦 · 関 俊彦
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
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
as Muzan Kibutsuji (voice)
Kamen Rider
1971
as Kamen Rider Den-O (voice) / Momotaros (voice)
Bleach
2004
as Aaroniero Arruruerie (voice)
Naruto
2002
as Iruka Umino (voice)
Hunter x Hunter
2011
as Wing (voice)
Naruto Shippūden
2007
as Iruka Umino (voice)
TV Shows (126)
Kamen Rider
1971
as Kamen Rider Den-O (voice) / Momotaros (voice)
Bleach
2004
as Aaroniero Arruruerie (voice)
Naruto
2002
as Iruka Umino (voice)
Hunter x Hunter
2011
as Wing (voice)
Naruto Shippūden
2007
as Iruka Umino (voice)
Mob Psycho 100
2016
as Morizo Ebihara (voice) / Musashi Goda (voice)
Ranma ½
1989
as Mousse (voice)
Mobile Suit Gundam SEED
2002
as Rau Le Creuset (voice) / Rey Za Burrel (voice)
Rurouni Kenshin
2023
as Narration (voice)
The Misfit of Demon King Academy
2020
as Ahide Alobo Agatze (voice)
Ninja Boy Rantaro
1993
as Hansuke Doi
Kaiju No. 8
2024
as Kaiju No. 11 (voice)
Ranma1/2
2024
as Mousse (voice)
MÄR: Märchen Awakens Romance
2005
as Danna Toramizu
Saint Seiya: The Hades Chapter
2002
as Milo (voice)
A Certain Magical Index
2008
as Aleister Crowley (voice)
Golden Kamuy
2018
as Kazuo Henmi (voice)
Sekirei
2008
as Hiroto Minaka
Saiyuki
2000
as Genjo Sanzo (voice) / Konzen Douji (voice)
Demon Slayer: Kimetsu no Yaiba
2019
as Muzan Kibutsuji (voice)
Space Dandy
2014
as Public Prosecutor (voice)
PLUTO
2023
as Sahad (voice) / Pluto (voice)
Nadia: The Secret of Blue Water
1990
as Fejto (voice)
Higurashi: When They Cry
2006
as Kyousuke Irie (voice)
TRIGUN
1998
as Legato Bluesummers (voice)
Samurai Champloo
2004
as Yamane (voice)
Hakkenden: Legend of the Dog Warriors
1990
as Shino Inuzuka (voice)
Star☆Twinkle PreCure
2019
as Toto Hagoromo (voice)
Guilty Crown
2011
as Kurosu Ouma (voice)
Higurashi: When They Cry - NEW
2020
as Kyousuke Irie (voice)
The Most Heretical Last Boss Queen: From Villainess to Savior
2023
as Clark Darwin (voice)
Yawara!
1989
as Matsuda / Eiji (voice)
To Be Hero
2016
as Chinese Tohoku Muffler (voice)
Showa Genroku Rakugo Shinju
2016
as Eisuke Higuchi (voice)
Mobile Suit Gundam Wing
1995
as Duo Maxwell (voice)
Glitter Force
2012
as Hiroshi Hoshizora
The Ryuo's Work is Never Done!
2018
as Kiyotaki Kousuke (voice)
Black Jack
1993
as Tokio Umetani (voice)
Paranoia Agent
2004
as Mitsuhiro Maniwa (voice)
SAINT SEIYA: Knights of the Zodiac
2019
as Scorpio Milo (voice)
The Irresponsible Captain Tylor OVA
1994
as Dom (voice)
My-Hime
2004
as Reito Kanzaki (voice)
Blade of the Immortal
2008
as Souri (voice)
The Irresponsible Captain Tylor
1993
as Ru Baraba Dom
I Have a Crush at Work
2025
as Pastor (voice)
Future GPX Cyber Formula
1991
as Jotaro Kaga
Katanagatari
2010
as Umigame Maniwa (voice)
Cross Ange: Rondo of Angels and Dragons
2014
as Embryo (voice)
HIGH CARD
2023
as Norman Kingstat (voice)
Sarazanmai
2019
as Yuri Kamome
Mashin Creator Wataru
2025
as Mr. Liar (voice)
Saint Seiya: Saintia Sho
2018
as Scorpio Milo (voice)
Requiem from the Darkness
2003
as Momosuke Yamaoka (voice)
Saint Seiya: Soul of Gold
2015
as Scorpio Milo (voice)
B'T X
1996
as Quatro (voice)
Please Save My Earth
1993
as Mikuro Yakushimaru (voice)
Gingitsune: Messenger Fox of the Gods
2013
as Tatsuo Saeki (voice)
Magical Emi, the Magic Star
1985
as Customer A (voice)
I Parry Everything
2024
as Carew (voice)
Madö King Granzört
1989
as Grunwald
Movies (112)
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
as Muzan Kibutsuji (voice)
Castle in the Sky
1986
as Additional Voices (voice)
Black Clover: Sword of the Wizard King
2023
as Conrad Leto (voice)
Road to Ninja: Naruto the Movie
2012
as Iruka Umino (voice)
Detective Conan: Quarter of Silence
2011
as Shogo Hikawa (voice)
My Hero Academia: World Heroes' Mission
2021
as Eddie Soul (voice)
Ninja Scroll
1993
as Yurimaru (voice)
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
as Muzan Kibutsuji (voice)
Hunter x Hunter: The Last Mission
2013
as Wing (voice)
Ocean Waves
1993
as Yutaka Matsuno (voice)
X: The Movie
1996
as Shougo
Ranma 1/2 the Movie 2: Nihao My Concubine
1992
as Mousse (voice)
Kamen Rider Heisei Generations Forever
2018
as Momotaros / Kamen Rider Den-O Sword Form (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
as Mousse (voice)
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
as Momotaros (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
as Momotaros / Kamen Rider Den-O (voice)
Balthus: Tia's Radiance
1988
as Eud (voice)
Gundam Wing: The Endless Waltz
1998
as Duo Maxwell (voice)
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
as Momotaros (voice) / Kamen Rider Den-O (voice)
The Birth of Kitaro: The Mystery of GeGeGe
2023
as Kitarou's Father (voice)
Mazinger Z: Infinity
2017
as Tetsuya Tsurugi (voice)
Twilight of the Dark Master
1997
as Shijo Tsunami (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011
as Momotaros / Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Super Sentai: Super Hero Wars
2012
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
as Momotaros (voice)
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
as Muzan Kibutsuji (voice)
Kamen Rider Den-O The Movie: I'm Born!
2007
as Momotaros (voice)
Naruto OVA 12: The Day Naruto Became Hokage
2016
as Iruka Umino (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
as Hansuke Doi (voice)
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
as Kamen Rider Den-O (voice)
Nadia: The Secret of Blue Water - The Motion Picture
1991
as Falt (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
2010
as Momotaros (voice)
Goddamn
1990
as Hans Schultz
Kamen Rider Den-O & Kiva: Climax Deka
2008
as Momotaros (voice)
Kamen Rider Kiva: King of the Castle in the Demon World
2008
as Penetentiary Officer Sanjo
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
as Char Aznable (voice)
Violinist of Hamelin: The Movie
1996
as Raiel (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
2011
as Momotaros (voice)
Nadia: The Secret of Blue Water - Nautilus Story II
1991
as Fate (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
as Kamen Rider Den-O Sword Form (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
2010
as Momotaros (voice)
Reign: The Conqueror Movie
2000
as Alexander
Zillion: Burning Night
1988
as J.J. (voice)
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
2008
as Momotaros (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024
as Hansuke Doi (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017
as Momotaros
Love Wedge 2
1994
as Riki (voice)
Bio Hunter
1995
as Komada
Farewell Kamen Rider Den-O: Final Countdown
2008
as Momotaros (voice)
Angel Cop
1989
as Tachihara (voice)
Kamen Rider Den-O: Final Trilogy Special Edition
2008
as Momotaros (voice)
Hades Project: Zeorymer Separation
1988
as Masato Akitsu (voice) / Masaki Kihara (voice)
Oruorane the Cat Player
1992
as The Cellist
Cinderella Express
1989
as Yuji Shimano
Ultraman Super Fighter Legend
1996
as Ultraseven / Ultraman Leo (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020
as Momotaros (voice)
Inferious Interplanetary War Chronicle - Condition Green
1991
as Soo Laform (voice)
Hades Project: Zeorymer Extinction
1989
as Masato Akitsu / Masaki Kihara (voice)
Yawara! Go Get 'Em, Wimpy Kids!!
1992
as (voice)
Kiss Me on the Apple of My Eye
1993
as Naoto (voice)
Momotaros' Summer Vacation
2007
as Momotaros (voice)
Kamen Rider Den-O: Singing, Dancing, Great Training!!
2007
as Momotaros (voice)
Suikoden Demon Century
1993
as Takateru Suga (voice)
Ryokunohara Labyrinth - Sparkling Phantom
1990
as Hiroki Imashi
Love Wedge 1
1992
as Riki (voice)
Campus Special Investigator Hikaruon
1987
as Hikaru Shihodo / Hikaruon (voice)
Animation Store Manager
2002
as Ryuu Raiba (voice)
The Weathering Continent
1992
as Tieh (voice)
Kamen Rider Den-O: Final Stage
2007
as Momotaros
Moonlight Pierce
1991
as Hiroshi Takama (voice)
Momotaros' King of the Crimson Castle
2008
as Momotaros (voice)
Saiyuki: Requiem
2001
as Genjo Sanzo (voice)
Marina the Manga Artist Goes to Camelot
1990
as Bijomaru Shizuka (voice)
Call Me Tonight
1986
as Hayata (voice)
Hisashi Eguchi's Kotobuki Goro Show
1991
as Piston Akagi (voice)
Maryuu Senki
1987
Scarlet Demon
1989
Genocyber
1994
as Sakomizu (voice)
Dragon Century
1988
as Carmine (voice)
Demon Hunter Makaryūdo
1989
as Shou Kurogane (voice)
Baby Felix & Friends
2000
as Felix The Cat
Yuukan Club
1991
Kaze wo Nuke!
1988
Higurashi: When They Cry - Outbreak
2013
as Kyousuke Irie (voice)
Heart-Coloured Killer Ticket
1990
as Chuta Misora (voice)
Download: Devil's Circuit
1992
as Sid (voice)
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
2009
as Momotaros (voice)
I'm Not an Angel!
1994
as Bunta Kouno (voice)
Calico Cat Holmes and the Lord of the Haunted Castle
1992
as Yoshitaro Katayama (voice)
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Kamen Rider Decade: Final Stage
2010
as Momotaros / Kamen Rider Den-O (Sword Form)
TO-Y
1987
as Shouji (voice)
Sunlight All Around! Ka - su - mi: You Were in My Dreams
1988
as Reporter B (voice)
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
2007
as Momotaros (voice)
Yawara! Atlanta Special
1996
Midoriyama High School, Koshien Edition (Movie)
1990
The Samurai
1987
as Takeshi Chimatsuri
10th Anniversary Project: Masked Rider LIVE & SHOW
2009
as Kamen Rider Den-O Sword Form (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2009
as Momotaros (voice)
Trusty Ginjiro
1991
as Hideki Mitsui (voice)
The End of the Century Darling
1996
as Todorokki Kouhei (voice)
Dorami-chan: A Blue Straw Hat
1994
as Crow (voice)
Milky Passion: Dougenzaka - The Castle of Love
1990
as Ootsuki (voice)
Handsome Girl
1991
as Ichiya Kumagai (voice)
TOKYO CITY Melhen 2
1990
Saiyuki Interactive
2002
Wild 7: Biker Knights
1994
as Dairoku Hiba
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
2026
as Gavarion Trigger System Voice (voice)
Untitled Super Space Sheriff Gavan Infinity Summer Movie
2026
as Cosmo Gavarion System Voice / Gavarion Trigger System Voice
Paranoia Agent: Part 1
2004
as まにわ みつひろ
Chimera: Angel of Death
1997
as Ron
About Toshihiko Seki
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 Bluesu… With 238 credits spanning from 1971 to 2026, Toshihiko Seki has appeared in 112 films and 126 TV shows.
Fans searching for Toshihiko Seki movies, Toshihiko Seki filmography, or the latest projects starring Toshihiko Seki can stream many of these titles on CineFlixo, free and in HD, with no subscription required.
Most Popular Toshihiko Seki Movies
- Demon Slayer: Kimetsu no Yaiba Infinity Castle (2025) — as Muzan Kibutsuji (voice)
- Castle in the Sky (1986) — as Additional Voices (voice)
- Black Clover: Sword of the Wizard King (2023) — as Conrad Leto (voice)
- Road to Ninja: Naruto the Movie (2012) — as Iruka Umino (voice)
- Detective Conan: Quarter of Silence (2011) — as Shogo Hikawa (voice)
Where to Watch Toshihiko Seki Films
Most Toshihiko Seki movies and series are available to stream on CineFlixo in full HD, completely free and without signup. Browse the complete filmography above to jump directly to any title. For more films and the latest web series featuring Toshihiko Seki, check our movies catalogue and browse page.