Toshihiko Seki
Acting • Born 1962-06-11
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.
Filmography
242 credits
Castle in the Sky
Movie • 1986
Additional Voices (voice)
Twilight of the Dark Master
Movie • 1997
Shijo Tsunami (voice)
Ocean Waves
Movie • 1993
Yutaka Matsuno (voice)
I'm Not an Angel!
Movie • 1994
Bunta Kouno (voice)
Ninja Scroll
Movie • 1993
Yurimaru (voice)
Higurashi: When They Cry - Outbreak
Movie • 2013
Kyousuke Irie (voice)
Marina the Manga Artist Goes to Camelot
Movie • 1990
Bijomaru Shizuka (voice)
X: The Movie
Movie • 1996
Shougo
The End of the Century Darling
Movie • 1996
Todorokki Kouhei (voice)
Cinderella Express
Movie • 1989
Yuji Shimano
TOKYO CITY Melhen 2
Movie • 1990
Handsome Girl
Movie • 1991
Ichiya Kumagai (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
Movie • 2014
Kamen Rider Den-O Sword Form (voice)
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
Movie • 2007
Momotaros (voice)
Kamen Rider Den-O: Final Trilogy Special Edition
Movie • 2008
Momotaros (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker
Movie • 2009
Momotaros / Kamen Rider Den-O (voice)
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
Movie • 2009
Kamen Rider Den-O (voice)
Kamen Rider Kiva: King of the Castle in the Demon World
Movie • 2008
Penetentiary Officer Sanjo
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
Movie • 2017
Momotaros
Bio Hunter
Movie • 1995
Komada
My Hero Academia: World Heroes' Mission
Movie • 2021
Eddie Soul (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
Movie • 2010
Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
Movie • 2010
Momotaros (voice)
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
Movie • 2021
Momotaros (voice) / Kamen Rider Den-O (voice)
The Birth of Kitaro: The Mystery of GeGeGe
Movie • 2023
Kitarou's Father (voice)
Naruto OVA 12: The Day Naruto Became Hokage
Movie • 2016
Iruka Umino (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders
Movie • 2011
Momotaros / Kamen Rider Den-O Sword Form (voice)
Gundam Wing: The Endless Waltz
Movie • 1998
Duo Maxwell (voice)
Nadia: The Secret of Blue Water - Nautilus Story II
Movie • 1991
Fate (voice)
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
Movie • 2009
Momotaros (voice)
Black Clover: Sword of the Wizard King
Movie • 2023
Conrad Leto (voice)
Ryokunohara Labyrinth - Sparkling Phantom
Movie • 1990
Hiroki Imashi
The Samurai
Movie • 1987
Takeshi Chimatsuri
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
Movie • 2009
Momotaros (voice)
TO-Y
Movie • 1987
Shouji (voice)
Call Me Tonight
Movie • 1986
Hayata (voice)
Dragon Century
Movie • 1988
Carmine (voice)
The Weathering Continent
Movie • 1992
Tieh (voice)
Wild 7: Biker Knights
Movie • 1994
Dairoku Hiba
Genocyber
Movie • 1994
Sakomizu (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja
Movie • 2024
Hansuke Doi (voice)
Zillion: Burning Night
Movie • 1988
J.J. (voice)
Saiyuki: Requiem
Movie • 2001
Genjo Sanzo (voice)
Suikoden Demon Century
Movie • 1993
Takateru Suga (voice)
Heart-Coloured Killer Ticket
Movie • 1990
Chuta Misora (voice)
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
Movie • 2022
Muzan Kibutsuji (voice)
Balthus: Tia's Radiance
Movie • 1988
Eud (voice)
Demon Hunter Makaryūdo
Movie • 1989
Shou Kurogane (voice)
Download: Devil's Circuit
Movie • 1992
Sid (voice)
Yawara! Go Get 'Em, Wimpy Kids!!
Movie • 1992
(voice)
Yawara! Atlanta Special
Movie • 1996
Kamen Rider Den-O The Movie: I'm Born!
Movie • 2007
Momotaros (voice)
Kamen Rider Den-O & Kiva: Climax Deka
Movie • 2008
Momotaros (voice)
Farewell Kamen Rider Den-O: Final Countdown
Movie • 2008
Momotaros (voice)
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
Movie • 2009
Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
Movie • 2010
Momotaros (voice)
Mazinger Z: Infinity
Movie • 2017
Tetsuya Tsurugi (voice)
Moonlight Pierce
Movie • 1991
Hiroshi Takama (voice)
Hades Project: Zeorymer Separation
Movie • 1988
Masato Akitsu (voice)
Hades Project: Zeorymer Separation
Movie • 1988
Masaki Kihara (voice)
Hades Project: Zeorymer Extinction
Movie • 1989
Masato Akitsu / Masaki Kihara (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
Movie • 2011
Hansuke Doi (voice)
Kiss Me on the Apple of My Eye
Movie • 1993
Naoto (voice)
Oruorane the Cat Player
Movie • 1992
The Cellist
Maryuu Senki
Movie • 1987
Campus Special Investigator Hikaruon
Movie • 1987
Hikaru Shihodo / Hikaruon (voice)
Kamen Rider Heisei Generations Forever
Movie • 2018
Momotaros / Kamen Rider Den-O Sword Form (voice)
Chimera: Angel of Death
Movie • 1997
Ron
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
Movie • 2011
Momotaros (voice)
Kamen Rider Den-O: Singing, Dancing, Great Training!!
Movie • 2007
Momotaros (voice)
Goddamn
Movie • 1990
Hans Schultz
Animation Store Manager
Movie • 2002
Ryuu Raiba (voice)
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
Movie • 2015
Char Aznable (voice)
Hisashi Eguchi's Kotobuki Goro Show
Movie • 1991
Piston Akagi (voice)
Angel Cop
Movie • 1989
Tachihara (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
Movie • 1991
Mousse (voice)
Calico Cat Holmes and the Lord of the Haunted Castle
Movie • 1992
Yoshitaro Katayama (voice)
Love Wedge 1
Movie • 1992
Riki (voice)
Love Wedge 2
Movie • 1994
Riki (voice)
Kamen Rider Decade: Final Stage
Movie • 2010
Momotaros / Kamen Rider Den-O (Sword Form)
Inferious Interplanetary War Chronicle - Condition Green
Movie • 1991
Soo Laform (voice)
Reign: The Conqueror Movie
Movie • 2000
Alexander
Midoriyama High School, Koshien Edition (Movie)
Movie • 1990
Sunlight All Around! Ka - su - mi: You Were in My Dreams
Movie • 1988
Reporter B (voice)
Kamen Rider Den-O: Final Stage
Movie • 2007
Momotaros
Road to Ninja: Naruto the Movie
Movie • 2012
Iruka Umino (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O!
Movie • 2020
Momotaros (voice)
Milky Passion: Dougenzaka - The Castle of Love
Movie • 1990
Ootsuki (voice)
Kamen Rider × Super Sentai: Super Hero Wars
Movie • 2012
Momotaros - Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars
Movie • 2017
Momotaros - Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
Movie • 2010
Hunter x Hunter: The Last Mission
Movie • 2013
Wing (voice)
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
Movie • 2019
Muzan Kibutsuji (voice)
Baby Felix & Friends
Movie • 2000
Felix The Cat
Detective Conan: Quarter of Silence
Movie • 2011
Shogo Hikawa (voice)
Yuukan Club
Movie • 1991
Violinist of Hamelin: The Movie
Movie • 1996
Raiel (voice)
Vampire Hunter D: Bloodlust
Movie • 2001
Grove Marcus (voice)
Ultraman Super Fighter Legend
Movie • 1996
Ultraseven / Ultraman Leo (voice)
Kaze wo Nuke!
Movie • 1988
Demon Slayer: Kimetsu no Yaiba Infinity Castle
Movie • 2025
Muzan Kibutsuji (voice)
Momotaros' Summer Vacation
Movie • 2007
Momotaros (voice)
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
Movie • 2008
Momotaros (voice)
Momotaros' King of the Crimson Castle
Movie • 2008
Momotaros (voice)
Scarlet Demon
Movie • 1989
Saiyuki Interactive
Movie • 2002
Trusty Ginjiro
Movie • 1991
Hideki Mitsui (voice)
Nadia: The Secret of Blue Water - The Motion Picture
Movie • 1991
Falt (voice)
Dorami-chan: A Blue Straw Hat
Movie • 1994
Crow (voice)
10th Anniversary Project: Masked Rider LIVE & SHOW
Movie • 2009
Kamen Rider Den-O Sword Form (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine
Movie • 1992
Mousse (voice)
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
Movie • 2026
Gavarion Trigger System Voice (voice)
Samurai Champloo
TV • 2004
Yamane (voice)
Mirage of Blaze
TV • 2002
Takaya Ohgi (voice)
Dragoon
TV • 1997
Rain Keeves Fearudo (voice)
Paranoia Agent
TV • 2004
Mitsuhiro Maniwa (voice)
Future GPX Cyber Formula
TV • 1991
Jotaro Kaga
Dragon Century
TV • 1988
Descendants of Darkness
TV • 2000
Yutaka Watari (voice)
My-Hime
TV • 2004
Reito Kanzaki (voice)
Saint Seiya: Saintia Sho
TV • 2018
Scorpio Milo (voice)
Reign: The Conqueror
TV • 1999
Alexander (voice)
Mob Psycho 100
TV • 2016
Morizo Ebihara (voice)
Mobile Suit Gundam SEED
TV • 2002
Rau Le Creuset (voice)
Nadia: The Secret of Blue Water
TV • 1990
Fejto (voice)
The Legend of Zorro
TV • 1996
Don Diego de la Vega / Zorro
The Irresponsible Captain Tylor OVA
TV • 1994
Dom (voice)
Mobile Suit Gundam Wing
TV • 1995
Duo Maxwell (voice)
Ranma ½
TV • 1989
Mousse (voice)
Blazing Transfer Student
TV • 1991
Noboru Takizawa (voice)
Madö King Granzört
TV • 1989
Grunwald
Bleach
TV • 2004
Aaroniero Arruruerie (voice)
Hyper Police
TV • 1997
Sakunoshin Chikura
Sekirei
TV • 2008
Hiroto Minaka
Ninja Boy Rantaro
TV • 1993
Hansuke Doi
Loving Angel Angelique
TV • 2006
Luva
Naruto Shippūden
TV • 2007
Iruka Umino (voice)
Psychic Detective Yakumo
TV • 2010
Isshin Saitō
Glitter Force
TV • 2012
Hiroshi Hoshizora
Naruto
TV • 2002
Iruka Umino (voice)
Katanagatari
TV • 2010
Umigame Maniwa (voice)
Zillion
TV • 1987
JJ
Aoki Densetsu Shoot!
TV • 1993
Akihiko Himuro (voice)
The Irresponsible Captain Tylor
TV • 1993
Ru Baraba Dom
Gin'yuu Mokushiroku Meine Liebe
TV • 2004
Ludwig Herzog von Mohn nahe Liechtenstein (voice)
Saiyuki
TV • 2000
Genjo Sanzo (voice)
Saiyuki
TV • 2000
Konzen Douji (voice)
Requiem from the Darkness
TV • 2003
Momosuke Yamaoka (voice)
Space Dandy
TV • 2014
Public Prosecutor (voice)
Higurashi: When They Cry
TV • 2006
Kyousuke Irie (voice)
Angelique: Twin Collection
TV • 2002
Luva (voice)
Udauda Yatteru Hima wa Nee!
TV • 1995
(voice)
Cross Ange: Rondo of Angels and Dragons
TV • 2014
Embryo (voice)
Here Is Greenwood
TV • 1991
Shinobu Tezuka (voice)
Izumo
TV • 1991
Izumo (voice)
Natsuki Crisis
TV • 1994
Kyōtarō Himuro
Princess Army: Wedding Combat
TV • 1992
Yuuya Hashiba
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
TV • 2022
Momotaros (voice)
The Most Heretical Last Boss Queen: From Villainess to Savior
TV • 2023
Clark Darwin (voice)
Spirit Warrior
TV • 1988
Kujaku (voice)
Saiyuki Gaiden
TV • 2011
Konzen Dōji (voice)
Kamen Rider
TV • 1971
Kamen Rider Den-O (voice)
Rurouni Kenshin
TV • 2023
Narration (voice)
Saiyuki Reload: Burial
TV • 2007
Genjō Sanzō (voice)
Ai no Kusabi
TV • 1992
Riki (voice)
Kamen Rider Den-O: Imagin Anime
TV • 2008
Momotaros (voice)
Saint Seiya: Soul of Gold
TV • 2015
Scorpio Milo (voice)
TRIGUN
TV • 1998
Legato Bluesummers (voice)
Armor Hunter Merowlink
TV • 1988
PFC Cepres
Kamen Rider
TV • 1971
Momotaros (voice)
Saint Seiya: The Hades Chapter
TV • 2002
Milo (voice)
SAINT SEIYA: Knights of the Zodiac
TV • 2019
Scorpio Milo (voice)
Black Jack
TV • 1993
Tokio Umetani (voice)
B'T X
TV • 1996
Quatro (voice)
Onimusha
TV • 2023
Kojiro Sasaki (voice)
Hunter x Hunter
TV • 2011
Wing (voice)
Special Duty Combat Unit Shinesman
TV • 1996
Shujin Seki (voice)
Hakkenden: Legend of the Dog Warriors
TV • 1990
Shino Inuzuka (voice)
Cookin' Idol Ai! Mai! Main!
TV • 2009
柊修
Hakugei: Legend of the Moby Dick
TV • 1997
PLUTO
TV • 2023
Sahad (voice)
PLUTO
TV • 2023
Pluto (voice)
The Laughing Salesman NEW
TV • 2017
Shisao Kihara(Story2)
Mob Psycho 100
TV • 2016
Musashi Goda (voice)
Bomberman B-Daman Bakugaiden
TV • 1998
SWORD GAI: The Animation
TV • 2018
Miura Takuma
Dash! Yonkuro
TV • 1989
Golden Kamuy
TV • 2018
Kazuo Henmi (voice)
Goddamn
TV • 1990
Hans Schultz
Dogs: Bullets & Carnage
TV • 2009
Ernst Rammsteiner
Darkness of the Sea, Shadow of the Moon
TV • 1989
Katsuyuki Touma (voice)
Magical Emi, the Magic Star
TV • 1985
Customer A (voice)
MÄR: Märchen Awakens Romance
TV • 2005
Danna Toramizu
A Certain Magical Index
TV • 2008
Aleister Crowley (voice)
Triple Combination: Transformers Go!
TV • 2013
Gekisōmaru (voice)
Detonator Orgun
TV • 1991
Knock
声優戦隊ボイストーム7
TV • 2013
(voice)
F
TV • 1988
Gunma Akagi (voice)
Wild 7
TV • 1994
Dairoku Hiba
Bビーダマン爆外伝V
TV • 1999
Kurobon
I Parry Everything
TV • 2024
Carew (voice)
HIGH CARD
TV • 2023
Norman Kingstat (voice)
The Ryuo's Work is Never Done!
TV • 2018
Kiyotaki Kousuke (voice)
Gingitsune: Messenger Fox of the Gods
TV • 2013
Tatsuo Saeki (voice)
Pet Shop of Horrors
TV • 1999
Count D (voice)
Shurato
TV • 1989
Shurato
The Misfit of Demon King Academy
TV • 2020
Ahide Alobo Agatze (voice)
Outlaw Star
TV • 1998
Fred (voice)
Nightwalker: The Midnight Detective
TV • 1998
Bait
Showa Genroku Rakugo Shinju
TV • 2016
Eisuke Higuchi (voice)
To Be Hero
TV • 2016
Chinese Tohoku Muffler (voice)
Mobile Suit Gundam SEED
TV • 2002
Rey Za Burrel (voice)
Legend of Heavenly Sphere Shurato: The Secret Feud of Creation
TV • 1991
Shurato
Yawara!
TV • 1989
Matsuda / Eiji (voice)
Sarazanmai
TV • 2019
Yuri Kamome
Demon Slayer: Kimetsu no Yaiba
TV • 2019
Muzan Kibutsuji (voice)
Blade of the Immortal
TV • 2008
Souri (voice)
Higurashi: When They Cry - NEW
TV • 2020
Kyousuke Irie (voice)
Please Save My Earth
TV • 1993
Mikuro Yakushimaru (voice)
D-1 Devastator
TV • 1992
谷田辺了
Kamen Rider Den-O
TV • 2007
Momotaros (voice)
Star☆Twinkle PreCure
TV • 2019
Toto Hagoromo (voice)
Nyūin Bokki Monogatari Ojiji ni!
TV • 1991
Evil Dragon War Chronicles
TV • 1987
錦繍 (voice)
Hades Project Zeorymer
TV • 1988
(voice)
THE REFLECTION
TV • 2017
Michael Holden (voice)
Momotaros' King of the Crimson Castle
TV • 2008
Momotaros (voice)
Mashin Creator Wataru
TV • 2025
Mr. Liar (voice)
U Takes Terra
TV • 2025
Chongyue (Voice)
Bastard!!
TV • 1992
Nightsong of Splendor
TV • 1989
I Have a Crush at Work
TV • 2025
Pastor (voice)
Guilty Crown
TV • 2011
Kurosu Ouma (voice)
Star Cat Full House
TV • 1989
Harlock Saga - The Ring of the Nibelungs
TV • 1999
SANDA
TV • 2025
Hifumi Ōshibu (voice)
Shonen Onmyouji
TV • 2006
Kaiju No. 8
TV • 2024
Kaiju No. 11 (voice)
Ranma1/2
TV • 2024
Mousse (voice)
Good Bye, Dragon Life
TV • 2024
Dio (voice)
Akai Hayate
TV • 1991
PROJECT R.E.D.
TV • 2026
GavarionTrigger / CosmoGavarion (voice)