Toshihiko Seki
Known for Acting · 241 credits
- Born
- 1962-06-11 (age 64)
- 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
TV Shows (128)
Ranma1/2
2024
as Mousse (voice)
Kamen Rider
1971
as Kamen Rider Den-O (voice) / Momotaros (voice)
Bleach
2004
as Aaroniero Arruruerie (voice)
Ninja Boy Rantaro
1993
as Hansuke Doi
Naruto
2002
as Iruka Umino (voice)
Hunter x Hunter
2011
as Wing (voice)
Mob Psycho 100
2016
as Morizo Ebihara (voice) / Musashi Goda (voice)
Naruto Shippūden
2007
as Iruka Umino (voice)
Ranma ½
1989
as Mousse (voice)
Saint Seiya: The Hades Chapter
2002
as Milo (voice)
Kaiju No. 8
2024
as Kaiju No. 11 (voice)
Guilty Crown
2011
as Kurosu Ouma (voice)
Mobile Suit Gundam SEED
2002
as Rau Le Creuset (voice) / Rey Za Burrel (voice)
Golden Kamuy
2018
as Kazuo Henmi (voice)
Saiyuki
2000
as Genjo Sanzo (voice) / Konzen Douji (voice)
Rurouni Kenshin
2023
as Narration (voice)
MÄR: Märchen Awakens Romance
2005
as Danna Toramizu
Showa Genroku Rakugo Shinju
2016
as Eisuke Higuchi (voice)
Sekirei
2008
as Hiroto Minaka
The Misfit of Demon King Academy
2020
as Ahide Alobo Agatze (voice)
A Certain Magical Index
2008
as Aleister Crowley (voice)
Demon Slayer: Kimetsu no Yaiba
2019
as Muzan Kibutsuji (voice)
To Be Hero
2016
as Chinese Tohoku Muffler (voice)
Ascendance of a Bookworm
2019
as Eustachius (voice)
Higurashi: When They Cry
2006
as Kyousuke Irie (voice)
PLUTO
2023
as Pluto (voice) / Sahad (voice)
Nadia: The Secret of Blue Water
1990
as Fejto (voice)
TRIGUN
1998
as Legato Bluesummers (voice)
SANDA
2025
as Hifumi Ōshibu (voice)
Star☆Twinkle PreCure
2019
as Toto Hagoromo (voice)
Yawara!
1989
as Matsuda / Eiji (voice)
Aoki Densetsu Shoot!
1993
as Akihiko Himuro (voice)
The Most Heretical Last Boss Queen: From Villainess to Savior
2023
as Clark Darwin (voice)
Glitter Force
2012
as Hiroshi Hoshizora
Madö King Granzört
1989
as Grunwald
Space Dandy
2014
as Public Prosecutor (voice)
Future GPX Cyber Formula
1991
as Jotaro Kaga
Mobile Suit Gundam Wing
1995
as Duo Maxwell (voice)
Samurai Champloo
2004
as Yamane (voice)
Cross Ange: Rondo of Angels and Dragons
2014
as Embryo (voice)
Higurashi: When They Cry - NEW
2020
as Kyousuke Irie (voice)
Kamen Rider Den-O
2007
as Momotaros (voice)
Shurato
1989
as Shurato
Please Save My Earth
1993
as Mikuro Yakushimaru (voice)
SAINT SEIYA: Knights of the Zodiac
2019
as Scorpio Milo (voice)
The Hakkenden: Legend of the Dog Warriors
1990
as Shino Inuzuka (voice)
HIGH CARD
2023
as Norman Kingstat (voice)
My Ribdiculous Reincarnation
2026
Katanagatari
2010
as Umigame Maniwa (voice)
Mashin Creator Wataru
2025
as Mr. Liar (voice)
Hakugei: Legend of the Moby Dick
1997
The Legend of Zorro
1996
as Don Diego de la Vega / Zorro
Black Jack
1993
as Tokio Umetani (voice)
I Parry Everything
2024
as Carew (voice)
I Have a Crush at Work
2025
as Pastor (voice)
Zillion
1987
as JJ
Hyper Police
1997
as Sakunoshin Chikura
My-Hime
2004
as Reito Kanzaki (voice)
PROJECT R.E.D.
2026
as GavarionTrigger / CosmoGavarion (voice)
Ai no Kusabi
1992
as Riki (voice)
Movies (113)
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
as Muzan Kibutsuji (voice)
Black Clover: Sword of the Wizard King
2023
as Conrad Leto (voice)
Castle in the Sky
1986
as Additional Voices (voice)
Detective Conan: Quarter of Silence
2011
as Shogo Hikawa (voice)
Road to Ninja: Naruto the Movie
2012
as Iruka Umino (voice)
Goddamn
1990
as Hans Schultz
Wild 7: Biker Knights
1994
as Dairoku Hiba
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
as Muzan Kibutsuji (voice)
Hades Project: Zeorymer Extinction
1989
as Masato Akitsu / Masaki Kihara (voice)
Mazinger Z: Infinity
2017
as Tetsuya Tsurugi (voice)
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
as Kamen Rider Den-O (voice)
Saiyuki: Requiem
2001
as Genjo Sanzo (voice)
My Hero Academia: World Heroes' Mission
2021
as Eddie Soul (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Hunter x Hunter: The Last Mission
2013
as Wing (voice)
Kamen Rider × Super Sentai: Super Hero Wars
2012
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Balthus: Tia's Radiance
1988
as Eud (voice)
Ninja Scroll
1993
as Yurimaru (voice)
Kamen Rider Kiva: King of the Castle in the Demon World
2008
as Penetentiary Officer Sanjo
Inferious Interplanetary War Chronicle - Condition Green
1991
as Soo Laform (voice)
Ocean Waves
1993
as Yutaka Matsuno (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011
as Momotaros / Kamen Rider Den-O Sword Form (voice)
X
1996
as Shougo
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
as Momotaros (voice) / Kamen Rider Den-O (voice)
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
2026
as Cosmo Gavarion System Voice / Gavarion Trigger System Voice
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
as Momotaros (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
as Hansuke Doi (voice)
Bio Hunter
1995
as Komada
Farewell Kamen Rider Den-O: Final Countdown
2008
as Momotaros (voice)
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
as Char Aznable (voice)
Nadia: The Secret of Blue Water - The Motion Picture
1991
as Falt (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
as Momotaros / Kamen Rider Den-O (voice)
Genocyber
1994
as Sakomizu (voice)
Paranoia Agent: Part 1
2004
as まにわ みつひろ
The Samurai
1987
as Takeshi Chimatsuri
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
2010
as Momotaros (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024
as Hansuke Doi (voice)
Sunlight All Around! Ka - su - mi: You Were in My Dreams
1988
as Reporter B (voice)
Call Me Tonight
1986
as Hayata (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine
1992
as Mousse (voice)
Gundam Wing: The Endless Waltz
1998
as Duo Maxwell (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
as Kamen Rider Den-O Sword Form (voice)
Naruto OVA 12: The Day Naruto Became Hokage
2016
as Iruka Umino (voice)
Zillion: Burning Night
1988
as J.J. (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020
as Momotaros (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
as Mousse (voice)
Kamen Rider Heisei Generations Forever
2018
as Momotaros / Kamen Rider Den-O Sword Form (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
2010
as Momotaros (voice)
Maryuu Senki
1987
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
as Momotaros (voice)
Animation Store Manager
2002
as Ryuu Raiba (voice)
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
2026
as Gavarion Trigger System Voice (voice)
Kamen Rider Den-O & Kiva: Climax Deka
2008
as Momotaros (voice)
Campus Special Investigator Hikaruon
1987
as Hikaru Shihodo / Hikaruon (voice)
Twilight of the Dark Master
1997
as Shijo Tsunami (voice)
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
as Muzan Kibutsuji (voice)
Yawara! Atlanta Special
1996
Kamen Rider Den-O The Movie: I'm Born!
2007
as Momotaros (voice)
Love Wedge 1
1992
as Riki (voice)
Baby Felix & Friends
2000
as Felix The Cat
I'm Not an Angel!
1994
as Bunta Kouno (voice)
Hisashi Eguchi's Kotobuki Goro Show
1991
as Piston Akagi (voice)
The Birth of Kitaro: The Mystery of GeGeGe
2023
as Kitarou's Father (voice)
Kamen Rider Den-O: Final Stage
2007
as Momotaros
Kiss Me on the Apple of My Eye
1993
as Naoto (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
2011
as Momotaros (voice)
Heart-Coloured Killer Ticket
1990
as Chuta Misora (voice)
Demon Hunter Makaryūdo
1989
as Shou Kurogane (voice)
Yuukan Club
1991
Download: Devil's Circuit
1992
as Sid (voice)
Midoriyama High School, Koshien Edition (Movie)
1990
TOKYO CITY Melhen 2
1990
Nadia: The Secret of Blue Water - Nautilus Story II
1991
as Fate (voice)
Kamen Rider Den-O: Singing, Dancing, Great Training!!
2007
as Momotaros (voice)
Love Wedge 2
1994
as Riki (voice)
Handsome Girl
1991
as Ichiya Kumagai (voice)
Yawara! Go Get 'Em, Wimpy Kids!!
1992
as (voice)
Momotaros' Summer Vacation
2007
as Momotaros (voice)
Angel Cop
1989
as Tachihara (voice)
Calico Cat Holmes and the Lord of the Haunted Castle
1992
as Yoshitaro Katayama (voice)
Ryokunohara Labyrinth - Sparkling Phantom
1990
as Hiroki Imashi
Dorami-chan: A Blue Straw Hat
1994
as Crow (voice)
Higurashi: When They Cry - Outbreak
2013
as Kyousuke Irie (voice)
10th Anniversary Project: Masked Rider LIVE & SHOW
2009
as Kamen Rider Den-O Sword Form (voice)
The End of the Century Darling
1996
as Todorokki Kouhei (voice)
Suikoden Demon Century
1993
as Takateru Suga (voice)
Saiyuki Interactive
2002
Ultraman Super Fighter Legend
1996
as Ultraseven / Ultraman Leo (voice)
Cinderella Express
1989
as Yuji Shimano
Kaze wo Nuke!
1988
Violinist of Hamelin: The Movie
1996
as Raiel (voice)
The Weathering Continent
1992
as Tieh (voice)
Kamen Rider Den-O: Final Trilogy Special Edition
2008
as Momotaros (voice)
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
2008
as Momotaros (voice)
Scarlet Demon
1989
TO-Y
1987
as Shouji (voice)
Marina the Manga Artist Goes to Camelot
1990
as Bijomaru Shizuka (voice)
Trusty Ginjiro
1991
as Hideki Mitsui (voice)
Reign: The Conqueror Movie
2000
as Alexander
Milky Passion: Dougenzaka - The Castle of Love
1990
as Ootsuki (voice)
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
2009
as Momotaros (voice)
Dragon Century
1988
as Carmine (voice)
Momotaros' King of the Crimson Castle
2008
as Momotaros (voice)
Moonlight Pierce
1991
as Hiroshi Takama (voice)
Oruorane the Cat Player
1992
as The Cellist
Kamen Rider Decade: Final Stage
2010
as Momotaros / Kamen Rider Den-O (Sword Form)
Hades Project: Zeorymer Separation
1988
as Masato Akitsu (voice) / Masaki Kihara (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017
as Momotaros
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
2007
as Momotaros (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2009
as Momotaros (voice)
Chimera: Angel of Death
1997
as Ron
Super Space Sheriff Gavan Infinity
as Gavarion Trigger / Cosmo Gavarion (voice), Supreme Chancellor
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 241 credits spanning from 1971 to 2026, Toshihiko Seki has appeared in 113 films and 128 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 Bowood.TV, 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)
- Black Clover: Sword of the Wizard King (2023) — as Conrad Leto (voice)
- Castle in the Sky (1986) — as Additional Voices (voice)
- Detective Conan: Quarter of Silence (2011) — as Shogo Hikawa (voice)
- Road to Ninja: Naruto the Movie (2012) — as Iruka Umino (voice)
Where to Watch Toshihiko Seki Films
Most Toshihiko Seki movies and series are available to stream on Bowood.TV 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.