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