Cast & creator
Toshihiko Seki
Best known for Kamen Rider, Kamen Rider, Bleach
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.
Also known as: せき としひこ, 关俊彦, 関 俊彦
115
film credits
136
television credits
248
1971–2026 · acting roles
6.6
average across scored titles
Signature credits
Known for
Across film & television
Filmography (251)
Showing 251 of 251 credits
Kamen Rider
Kamen Rider Den-O (voice)
1971Kamen Rider
Momotaros (voice)
1971
Bleach
Aaroniero Arruruerie (voice)
2004
Ninja Boy Rantaro
Hansuke Doi
1993
Naruto
Iruka Umino (voice)
2002
Ranma1/2
Mousse (voice)
2024
Ranma ½
Mousse (voice)
1989
Hunter x Hunter
Wing (voice)
2011
Naruto Shippūden
Iruka Umino (voice)
2007
Demon Slayer: Kimetsu no Yaiba Infinity Castle
Muzan Kibutsuji (voice)
2025
Mobile Suit Gundam SEED
Rau Le Creuset (voice)
2002Mobile Suit Gundam SEED
Rey Za Burrel (voice)
2002
Golden Kamuy
Kazuo Henmi (voice)
2018
Mob Psycho 100
Morizo Ebihara (voice)
2016Mob Psycho 100
Musashi Goda (voice)
2016
Kaiju No. 8
Kaiju No. 11 (voice)
2024
Saiyuki
Konzen Douji (voice)
2000Saiyuki
Genjo Sanzo (voice)
2000
Ascendance of a Bookworm
Eustachius (voice)
2019
Rurouni Kenshin
Narration (voice)
2023
A Certain Magical Index
Aleister Crowley (voice)
2008
MÄR: Märchen Awakens Romance
Danna Toramizu
2005
Sekirei
Hiroto Minaka
2008
The Misfit of Demon King Academy
Ahide Alobo Agatze (voice)
2020
Yawara!
Matsuda / Eiji (voice)
1989
Higurashi: When They Cry - NEW
Kyousuke Irie (voice)
2020
Demon Slayer: Kimetsu no Yaiba
Muzan Kibutsuji (voice)
2019
Descending Stories
Eisuke Higuchi (voice)
2016
Higurashi: When They Cry
Kyousuke Irie (voice)
2006
Nadia: The Secret of Blue Water
Fejto (voice)
1990
Guilty Crown
Kurosu Ouma (voice)
2011
Saint Seiya: The Hades Chapter
Milo (voice)
2002
Mobile Suit Gundam Wing
Duo Maxwell (voice)
1995
Future GPX Cyber Formula
Jotaro Kaga
1991
PROJECT R.E.D.
GavarionTrigger / CosmoGavarion (voice)
2026
PLUTO
Sahad (voice)
2023PLUTO
Pluto (voice)
2023
Star☆Twinkle PreCure
Toto Hagoromo (voice)
2019
Samurai Champloo
Yamane (voice)
2004
The Hakkenden: Legend of the Dog Warriors
Shino Inuzuka (voice)
1990
SAINT SEIYA: Knights of the Zodiac
Scorpio Milo (voice)
2019
TRIGUN
Legato Bluesummers (voice)
1998
Glitter Force
Hiroshi Hoshizora
2012
Space Dandy
Public Prosecutor (voice)
2014
My-Hime
Reito Kanzaki (voice)
2004
The Most Heretical Last Boss Queen: From Villainess to Savior
Clark Darwin (voice)
2023
Black Clover: Sword of the Wizard King
Conrad Leto (voice)
2023
The Legend of Zorro
Don Diego de la Vega / Zorro
1996
The Irresponsible Captain Tylor
Ru Baraba Dom
1993
Magical Emi, the Magic Star
Customer A (voice)
1985
To Be Hero
Chinese Tohoku Muffler (voice)
2016
Aoki Densetsu Shoot!
Akihiko Himuro (voice)
1993
Paranoia Agent
Mitsuhiro Maniwa (voice)
2004
I Have a Crush at Work
Pastor (voice)
2025
Madö King Granzört
Grunwald
1989
Castle in the Sky
Additional Voices (voice)
1986
Cross Ange: Rondo of Angels and Dragons
Embryo (voice)
2014
Mashin Creator Wataru
Mr. Liar (voice)
2025
B'T X
Quatro (voice)
1996
Good Bye, Dragon Life
Dio (voice)
2024
Blade of the Immortal
Souri (voice)
2008
SANDA
Hifumi Ōshibu (voice)
2025
The Ryuo's Work is Never Done!
Kiyotaki Kousuke (voice)
2018
Saint Seiya: Soul of Gold
Scorpio Milo (voice)
2015
HIGH CARD
Norman Kingstat (voice)
2023
Katanagatari
Umigame Maniwa (voice)
2010
Black Jack
Tokio Umetani (voice)
1993
I Parry Everything
Carew (voice)
2024
Loving Angel Angelique
Luva
2006
My Ribdiculous Reincarnation
2026
Shurato
Shurato
1989
Mobile Suit Gundam SEED HD Remaster
Rey Za Burrel (voice), Rau Le Creuset (voice)
2011
Sarazanmai
Yuri Kamome
2019
Hyper Police
Sakunoshin Chikura
1997
Saint Seiya: Saintia Sho
Scorpio Milo (voice)
2018
Zillion
JJ
1987
Detective Conan: Quarter of Silence
Shogo Hikawa (voice)
2011
Road to Ninja: Naruto the Movie
Iruka Umino (voice)
2012
SWORD GAI: The Animation
Miura Takuma
2018
Kamen Rider Den-O
Momotaros (voice)
2007
The Laughing Salesman NEW
Shisao Kihara(Story2)
2017
My-Otome
Rad (voice)
2005
Mirage of Blaze
Takaya Ohgi (voice)
2002
Gin'yuu Mokushiroku Meine Liebe
Ludwig Herzog von Mohn nahe Liechtenstein (voice)
2004
Dash! Yonkuro
1989
Onimusha
Kojiro Sasaki (voice)
2023
Requiem from the Darkness
Momosuke Yamaoka (voice)
2003
Bastard!!
1992
Spirit Warrior
Kujaku (voice)
1988
My Hero Academia: World Heroes' Mission
Eddie Soul (voice)
2021
Armor Hunter Merowlink
PFC Cepres
1988
Outlaw Star
Fred (voice)
1998
Gingitsune: Messenger Fox of the Gods
Tatsuo Saeki (voice)
2013
Shonen Onmyouji
2006
Kamen Rider Den-O: Imagin Anime
Momotaros (voice)
2008
Bビーダマン爆外伝V
Kurobon
1999
Bomberman B-Daman Bakugaiden
1998
Triple Combination: Transformers Go!
Gekisōmaru (voice)
2013
Ocean Waves
Yutaka Matsuno (voice)
1993
U Takes Terra
Chongyue (Voice)
2025
Mazinger Z: Infinity
Tetsuya Tsurugi (voice)
2017
Hakugei: Legend of the Moby Dick
1997
Nightwalker: The Midnight Detective
Bait
1998
The Irresponsible Captain Tylor OVA
Dom (voice)
1994
Descendants of Darkness
Yutaka Watari (voice)
2000
Reign: The Conqueror
Alexander (voice)
1999
F
Gunma Akagi (voice)
1988
Psychic Detective Yakumo
Isshin Saitō
2010
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
Muzan Kibutsuji (voice)
2019
Hades Project Zeorymer
(voice)
1988
Please Save My Earth
Mikuro Yakushimaru (voice)
1993
Hunter x Hunter: The Last Mission
Wing (voice)
2013
Nyūin Bokki Monogatari Ojiji ni!
1991
Dogs: Bullets & Carnage
Ernst Rammsteiner
2009
Detonator Orgun
Knock
1991
Here Is Greenwood
Shinobu Tezuka (voice)
1991
Ninja Scroll
Yurimaru (voice)
1993
X
Shougo
1996
Cookin' Idol Ai! Mai! Main!
柊修
2009
THE REFLECTION
Michael Holden (voice)
2017
Flaming Rugby Boy: Dodge Danpei
Nikaidou
1991
Ai no Kusabi
Riki (voice)
1992
Blazing Transfer Student
Noboru Takizawa (voice)
1991
Angelique: Twin Collection
Luva (voice)
2002Angelique: Twin Collection
Theme Song Performance
2002
Harlock Saga - The Ring of the Nibelungs
1999
Evil Dragon War Chronicles
錦繍 (voice)
1987
Akai Hayate
1991
Ranma 1/2 the Movie 2: Nihao My Concubine
Mousse (voice)
1992
Pet Shop of Horrors
Count D (voice)
1999
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
Char Aznable (voice)
2015
Gundam Wing: The Endless Waltz
Duo Maxwell (voice)
1998
Legend of Heavenly Sphere Shurato: The Secret Feud of Creation
Shurato
1991
Dragon Century
Carmine
1988
Wild 7
Dairoku Hiba
1994
Nightsong of Splendor
1989
Saiyuki Reload: Burial
Genjō Sanzō (voice)
2007
Udauda Yatteru Hima wa Nee!
(voice)
1995
Special Duty Combat Unit Shinesman
Shujin Seki (voice)
1996
声優戦隊ボイストーム7
(voice)
2013
Kamen Rider × Super Sentai: Super Hero Wars
Momotaros - Kamen Rider Den-O Sword Form (voice)
2012
Dragoon
Rain Keeves Fearudo (voice)
1997
Saiyuki Gaiden
Konzen Dōji (voice)
2011
Balthus: Tia's Radiance
Eud (voice)
1988
Kamen Rider × Super Sentai: Ultra Super Hero Wars
Momotaros - Kamen Rider Den-O Sword Form (voice)
2017
Momotaros' King of the Crimson Castle
Momotaros (voice)
2008
Naruto OVA 12: The Day Naruto Became Hokage
Iruka Umino (voice)
2016
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
Mousse (voice)
1991
Darkness of the Sea, Shadow of the Moon
Katsuyuki Touma (voice)
1989
Goddamn
Hans Schultz
1990
Saiyuki: Requiem
Genjo Sanzo (voice)
2001
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
Muzan Kibutsuji (voice)
2022
Nintama Rantarō: Invincible Master of the Dokutake Ninja
Hansuke Doi (voice)
2024
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
Kamen Rider Den-O (voice)
2009
The Birth of Kitaro: The Mystery of GeGeGe
Kitarou's Father (voice)
2023
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
Momotaros (voice)
2010
Natsuki Crisis
Kyōtarō Himuro
1994
Kamen Rider Decade: All Riders vs. Dai-Shocker
Momotaros / Kamen Rider Den-O (voice)
2009
Kamen Rider Den-O & Kiva: Climax Deka
Momotaros (voice)
2008Kamen Rider Den-O & Kiva: Climax Deka
Theme Song Performance
2008
Love Wedge 2
Riki (voice)
1994
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
Kamen Rider Den-O Sword Form (voice)
2014
Kamen Rider Heisei Generations Forever
Momotaros / Kamen Rider Den-O Sword Form (voice)
2018
Twilight of the Dark Master
Shijo Tsunami (voice)
1997
OOO, Den-O, All Riders: Let's Go Kamen Riders
Momotaros / Kamen Rider Den-O Sword Form (voice)
2011
Download: Devil's Circuit
Sid (voice)
1992
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
Momotaros (voice)
2010
Kamen Rider Kiva: King of the Castle in the Demon World
Penetentiary Officer Sanjo
2008
Nadia: The Secret of Blue Water - The Motion Picture
Falt (voice)
1991
Inferious Interplanetary War Chronicle - Condition Green
Soo Laform (voice)
1991
Higurashi: When They Cry - Outbreak
Kyousuke Irie (voice)
2013
D-1 Devastator
谷田辺了
1992
Baby Felix & Friends
Felix The Cat
2000
Bio Hunter
Komada
1995
Farewell Kamen Rider Den-O: Final Countdown
Momotaros (voice)
2008
Star Cat Full House
1989
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
Momotaros (voice)
2009Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
Theme Song Performance
2009
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
Momotaros (voice)
2010
Angel Cop
Tachihara (voice)
1989
Campus Special Investigator Hikaruon
Hikaru Shihodo / Hikaruon (voice)
1987
Kamen Rider Den-O The Movie: I'm Born!
Momotaros (voice)
2007
10th Anniversary Project: Masked Rider LIVE & SHOW
Kamen Rider Den-O Sword Form (voice)
2009
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
Momotaros (voice) / Kamen Rider Den-O (voice)
2021
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
Cosmo Gavarion System Voice / Gavarion Trigger System Voice
2026
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
Hansuke Doi (voice)
2011
Goddamn
Hans Schultz
1990
The Samurai
Takeshi Chimatsuri
1987
Izumo
Izumo (voice)
1991
Wild 7: Biker Knights
Dairoku Hiba
1994
Princess Army: Wedding Combat
Yuuya Hashiba
1992
The Weathering Continent
Tieh (voice)
1992
Suikoden Demon Century
Takateru Suga (voice)
1993
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
Momotaros (voice)
2008
Marina the Manga Artist Goes to Camelot
Bijomaru Shizuka (voice)
1990
Kamen Rider Den-O: Singing, Dancing, Great Training!!
Momotaros (voice)
2007
Ultraman Super Fighter Legend
Ultraseven / Ultraman Leo (voice)
1996
Ryokunohara Labyrinth - Sparkling Phantom
Hiroki Imashi
1990
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
Momotaros
2017
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
Momotaros (voice)
2022
Kaze wo Nuke!
1988
Sunlight All Around! Ka - su - mi: You Were in My Dreams
Reporter B (voice)
1988
Hades Project: Zeorymer Extinction
Masato Akitsu / Masaki Kihara (voice)
1989
Genocyber
Sakomizu (voice)
1994
Momotaros' Summer Vacation
Momotaros (voice)
2007
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
Momotaros (voice)
2011Momotaros' King of the Crimson Castle
Momotaros (voice)
2008
Violinist of Hamelin: The Movie
Raiel (voice)
1996
Zillion: Burning Night
J.J. (voice)
1988
Moonlight Pierce
Hiroshi Takama (voice)
1991
Call Me Tonight
Hayata (voice)
1986
Reign: The Conqueror Movie
Alexander
2000
Calico Cat Holmes and the Lord of the Haunted Castle
Yoshitaro Katayama (voice)
1992
Kamen Rider Den-O: Final Stage
Momotaros
2007
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
Gavarion Trigger System Voice (voice)
2026
The Irresponsible Captain Tylor: Tylor's War
Ru Baraba Dom (voice)
1994
Kamen Rider Den-O: Final Trilogy Special Edition
Momotaros (voice)
2008
The End of the Century Darling
Todorokki Kouhei (voice)
1996
Hisashi Eguchi's Kotobuki Goro Show
Piston Akagi (voice)
1991
Kiss Me on the Apple of My Eye
Naoto (voice)
1993
TO-Y
Shouji (voice)
1987
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
Momotaros (voice)
2009
Yawara! Atlanta Special
1996
TOKYO CITY Melhen 2
1990
Yawara! Go Get 'Em, Wimpy Kids!!
(voice)
1992
Kamen Rider Den-O: The Birth of Pretty Den-O!
Momotaros (voice)
2020
Hades Project: Zeorymer Separation
Masaki Kihara (voice)
1988Hades Project: Zeorymer Separation
Masato Akitsu (voice)
1988
Love Wedge 1
Riki (voice)
1992
Scarlet Demon
1989
I'm Not an Angel!
Bunta Kouno (voice)
1994
Animation Store Manager
Ryuu Raiba (voice)
2002
Oruorane the Cat Player
The Cellist
1992
Dragon Century
Carmine (voice)
1988
Nadia: The Secret of Blue Water - Nautilus Story II
Fate (voice)
1991
Demon Hunter Makaryūdo
Shou Kurogane (voice)
1989
Cinderella Express
Yuji Shimano
1989
Trusty Ginjiro
Hideki Mitsui (voice)
1991
Maryuu Senki
1987
Milky Passion: Dougenzaka - The Castle of Love
Ootsuki (voice)
1990
Yuukan Club
1991
Midoriyama High School, Koshien Edition (Movie)
1990
Heart-Coloured Killer Ticket
Chuta Misora (voice)
1990
Dorami-chan: A Blue Straw Hat
Crow (voice)
1994
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
Saiyuki Interactive
2002
Handsome Girl
Ichiya Kumagai (voice)
1991
Kamen Rider Decade: Final Stage
Momotaros / Kamen Rider Den-O (Sword Form)
2010
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
Momotaros (voice)
2009