Toshihiko Seki
Acting
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.
As actor 242
Kamen Rider
1971
Bleach
2004
Kaiju No. 8
2024
Hunter x Hunter
2011
Naruto Shippūden
2007
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
Naruto
2002
Ranma1/2
2024
Ranma ½
1989
Higurashi: When They Cry
2006
Yawara!
1989
A Certain Magical Index
2008
Mob Psycho 100
2016
Ascendance of a Bookworm
2019
Rurouni Kenshin
2023
Ninja Boy Rantaro
1993
Saiyuki
2000
Sekirei
2008
Golden Kamuy
2018
Mobile Suit Gundam SEED
2002
The Misfit of Demon King Academy
2020
Blade of the Immortal
2008
PLUTO
2023
TRIGUN
1998
Saint Seiya: The Hades Chapter
2002
Demon Slayer: Kimetsu no Yaiba
2019
My-Hime
2004
MÄR: Märchen Awakens Romance
2005
Samurai Champloo
2004
Castle in the Sky
1986
Guilty Crown
2011
Nadia: The Secret of Blue Water
1990
SAINT SEIYA: Knights of the Zodiac
2019
Mobile Suit Gundam Wing
1995
Higurashi: When They Cry - NEW
2020
The Most Heretical Last Boss Queen: From Villainess to Savior
2023
Space Dandy
2014
Future GPX Cyber Formula
1991
SANDA
2025
Black Clover: Sword of the Wizard King
2023
I Have a Crush at Work
2025
PROJECT R.E.D.
2026
The Irresponsible Captain Tylor OVA
1994
Saint Seiya: Saintia Sho
2018
B'T X
1996
I Parry Everything
2024
To Be Hero
2016
Glitter Force
2012
Descending Stories
2016
Nightwalker: The Midnight Detective
1998
Road to Ninja: Naruto the Movie
2012
Shurato
1989
My Hero Academia: World Heroes' Mission
2021
Detective Conan: Quarter of Silence
2011
My-Otome
2005
Cross Ange: Rondo of Angels and Dragons
2014
My Ribdiculous Reincarnation
2026
Triple Combination: Transformers Go!
2013
Madö King Granzört
1989
Ninja Scroll
1993
Star☆Twinkle PreCure
2019
Mashin Creator Wataru
2025
Paranoia Agent
2004
Onimusha
2023
Ocean Waves
1993
Saint Seiya: Soul of Gold
2015
Kamen Rider Den-O: Imagin Anime
2008
Bomberman B-Daman Bakugaiden
1998
The Hakkenden: Legend of the Dog Warriors
1990
Mirage of Blaze
2002
SWORD GAI: The Animation
2018
HIGH CARD
2023
The Irresponsible Captain Tylor
1993
Black Jack
1993
Magical Emi, the Magic Star
1985
Good Bye, Dragon Life
2024
Hunter x Hunter: The Last Mission
2013
Mazinger Z: Infinity
2017
The Legend of Zorro
1996
The Laughing Salesman NEW
2017
Sarazanmai
2019
Dash! Yonkuro
1989
The Ryuo's Work is Never Done!
2018
Hades Project Zeorymer
1988
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
Katanagatari
2010
Ranma 1/2 the Movie 2: Nihao My Concubine
1992
THE REFLECTION
2017
Aoki Densetsu Shoot!
1993
Zillion
1987
Outlaw Star
1998
Hakugei: Legend of the Moby Dick
1997
Gundam Wing: The Endless Waltz
1998
Hyper Police
1997
Bastard!!
1992
Gingitsune: Messenger Fox of the Gods
2013
U Takes Terra
2025
Gin'yuu Mokushiroku Meine Liebe
2004
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
Requiem from the Darkness
2003
Kamen Rider Den-O
2007
Bビーダマン爆外伝V
1999
Armor Hunter Merowlink
1988
Ai no Kusabi
1992
X
1996
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024
Descendants of Darkness
2000
Reign: The Conqueror
1999
Psychic Detective Yakumo
2010
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
Shonen Onmyouji
2006
Legend of Heavenly Sphere Shurato: The Secret Feud of Creation
1991
Dragon Century
1988
Spirit Warrior
1988
Blazing Transfer Student
1991
Balthus: Tia's Radiance
1988
Pet Shop of Horrors
1999
Cookin' Idol Ai! Mai! Main!
2009
Flaming Rugby Boy: Dodge Danpei
1991
Please Save My Earth
1993
Hades Project: Zeorymer Extinction
1989
Naruto OVA 12: The Day Naruto Became Hokage
2016
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011
Kamen Rider Heisei Generations Forever
2018
Here Is Greenwood
1991
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
Akai Hayate
1991
Twilight of the Dark Master
1997
Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
F
1988
Dogs: Bullets & Carnage
2009
Loving Angel Angelique
2006
Love Wedge 2
1994
Kamen Rider × Super Sentai: Super Hero Wars
2012
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
2026
声優戦隊ボイストーム7
2013
Detonator Orgun
1991
Harlock Saga - The Ring of the Nibelungs
1999
Saiyuki: Requiem
2001
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
Evil Dragon War Chronicles
1987
The Birth of Kitaro: The Mystery of GeGeGe
2023
Kamen Rider Kiva: King of the Castle in the Demon World
2008
Angelique: Twin Collection
2002
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
Campus Special Investigator Hikaruon
1987
Kamen Rider Den-O & Kiva: Climax Deka
2008
Bio Hunter
1995
Inferious Interplanetary War Chronicle - Condition Green
1991
Scarlet Demon
1989
Higurashi: When They Cry - Outbreak
2013
Nightsong of Splendor
1989
Saiyuki Reload: Burial
2007
Call Me Tonight
1986
Kamen Rider Den-O The Movie: I'm Born!
2007
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
Ultraman Super Fighter Legend
1996
Wild 7: Biker Knights
1994
Nadia: The Secret of Blue Water - The Motion Picture
1991
Wild 7
1994
Farewell Kamen Rider Den-O: Final Countdown
2008
Darkness of the Sea, Shadow of the Moon
1989
Angel Cop
1989
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
The Weathering Continent
1992
Goddamn
1990
Natsuki Crisis
1994
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
2010
Star Cat Full House
1989
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
Udauda Yatteru Hima wa Nee!
1995
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
2011
Special Duty Combat Unit Shinesman
1996
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
2010
The Samurai
1987
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
2022
Saiyuki Gaiden
2011
Love Wedge 1
1992
Izumo
1991
Download: Devil's Circuit
1992
Baby Felix & Friends
2000
Goddamn
1990
Sunlight All Around! Ka - su - mi: You Were in My Dreams
1988
Kamen Rider Den-O: Final Trilogy Special Edition
2008
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
2026
Princess Army: Wedding Combat
1992
Hades Project: Zeorymer Separation
1988
Genocyber
1994
Nadia: The Secret of Blue Water - Nautilus Story II
1991
Moonlight Pierce
1991
Suikoden Demon Century
1993
Kiss Me on the Apple of My Eye
1993
Dragoon
1997
Zillion: Burning Night
1988
Yuukan Club
1991
Momotaros' King of the Crimson Castle
2008
TO-Y
1987
I'm Not an Angel!
1994
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Violinist of Hamelin: The Movie
1996
Yawara! Go Get 'Em, Wimpy Kids!!
1992
D-1 Devastator
1992
Oruorane the Cat Player
1992
The End of the Century Darling
1996
Marina the Manga Artist Goes to Camelot
1990
Kamen Rider Den-O: Final Stage
2007
Hisashi Eguchi's Kotobuki Goro Show
1991
Kaze wo Nuke!
1988
Nyūin Bokki Monogatari Ojiji ni!
1991
Maryuu Senki
1987
10th Anniversary Project: Masked Rider LIVE & SHOW
2009
Ryokunohara Labyrinth - Sparkling Phantom
1990
Cinderella Express
1989
Handsome Girl
1991
Reign: The Conqueror Movie
2000
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020
Momotaros' Summer Vacation
2007
Paranoia Agent: Part 1
2004
TOKYO CITY Melhen 2
1990
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2009
Yawara! Atlanta Special
1996
Kamen Rider Den-O: Singing, Dancing, Great Training!!
2007
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
2008
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
2009
Calico Cat Holmes and the Lord of the Haunted Castle
1992
Kamen Rider Decade: Final Stage
2010
Animation Store Manager
2002
Milky Passion: Dougenzaka - The Castle of Love
1990
Heart-Coloured Killer Ticket
1990
Demon Hunter Makaryūdo
1989
Dragon Century
1988
Saiyuki Interactive
2002
Dorami-chan: A Blue Straw Hat
1994
Momotaros' King of the Crimson Castle
2008
Trusty Ginjiro
1991
Midoriyama High School, Koshien Edition (Movie)
1990
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
2007
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017
Chimera: Angel of Death
1997
The Irresponsible Captain Tylor: Tylor's War
1994