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 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.
238 acting credits
Acting · 238
Kamen Rider
1971
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
Bleach
2004
Naruto
2002
Naruto Shippūden
2007
Hunter x Hunter
2011
Mob Psycho 100
2016
Ranma ½
1989
Mobile Suit Gundam SEED
2002
Rurouni Kenshin
2023
The Misfit of Demon King Academy
2020
Kaiju No. 8
2024
Saint Seiya: The Hades Chapter
2002
Golden Kamuy
2018
A Certain Magical Index
2008
Sekirei
2008
Ninja Boy Rantaro
1993
Ranma1/2
2024
Demon Slayer: Kimetsu no Yaiba
2019
MÄR: Märchen Awakens Romance
2005
Space Dandy
2014
Saiyuki
2000
PLUTO
2023
Guilty Crown
2011
Star☆Twinkle PreCure
2019
Nadia: The Secret of Blue Water
1990
Samurai Champloo
2004
Higurashi: When They Cry
2006
The Most Heretical Last Boss Queen: From Villainess to Savior
2023
Higurashi: When They Cry - NEW
2020
TRIGUN
1998
Hakkenden: Legend of the Dog Warriors
1990
Black Jack
1993
To Be Hero
2016
Showa Genroku Rakugo Shinju
2016
The Ryuo's Work is Never Done!
2018
Paranoia Agent
2004
Glitter Force
2012
Mobile Suit Gundam Wing
1995
Yawara!
1989
Blade of the Immortal
2008
I Have a Crush at Work
2025
The Irresponsible Captain Tylor
1993
My-Hime
2004
Cross Ange: Rondo of Angels and Dragons
2014
Katanagatari
2010
The Irresponsible Captain Tylor OVA
1994
Saint Seiya: Saintia Sho
2018
Sarazanmai
2019
SAINT SEIYA: Knights of the Zodiac
2019
Future GPX Cyber Formula
1991
Mashin Creator Wataru
2025
Requiem from the Darkness
2003
I Parry Everything
2024
HIGH CARD
2023
Gingitsune: Messenger Fox of the Gods
2013
B'T X
1996
Magical Emi, the Magic Star
1985
Saint Seiya: Soul of Gold
2015
Madö King Granzört
1989
Please Save My Earth
1993
My Ribdiculous Reincarnation
2026
Bastard!!
1992
Hyper Police
1997
Good Bye, Dragon Life
2024
Castle in the Sky
1986
The Legend of Zorro
1996
Shurato
1989
Armor Hunter Merowlink
1988
Hades Project Zeorymer
1988
Black Clover: Sword of the Wizard King
2023
Road to Ninja: Naruto the Movie
2012
U Takes Terra
2025
Angelique: Twin Collection
2002
Gin'yuu Mokushiroku Meine Liebe
2004
The Laughing Salesman NEW
2017
Detective Conan: Quarter of Silence
2011
SANDA
2025
Aoki Densetsu Shoot!
1993
Reign: The Conqueror
1999
Descendants of Darkness
2000
Kamen Rider Den-O
2007
Zillion
1987
Detonator Orgun
1991
SWORD GAI: The Animation
2018
My Hero Academia: World Heroes' Mission
2021
Loving Angel Angelique
2006
Mirage of Blaze
2002
Ninja Scroll
1993
Nightwalker: The Midnight Detective
1998
Outlaw Star
1998
Triple Combination: Transformers Go!
2013
Udauda Yatteru Hima wa Nee!
1995
Ai no Kusabi
1992
Here Is Greenwood
1991
Ocean Waves
1993
Saiyuki Reload: Burial
2007
Bビーダマン爆外伝V
1999
Blazing Transfer Student
1991
Kamen Rider Den-O: Imagin Anime
2008
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
Special Duty Combat Unit Shinesman
1996
Wild 7
1994
PROJECT R.E.D.
2026
Evil Dragon War Chronicles
1987
Hunter x Hunter: The Last Mission
2013
声優戦隊ボイストーム7
2013
Ranma 1/2 the Movie 2: Nihao My Concubine
1992
Psychic Detective Yakumo
2010
Saiyuki Gaiden
2011
Cookin' Idol Ai! Mai! Main!
2009
THE REFLECTION
2017
Natsuki Crisis
1994
Dogs: Bullets & Carnage
2009
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
Dash! Yonkuro
1989
D-1 Devastator
1992
Onimusha
2023
X: The Movie
1996
Izumo
1991
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
F
1988
Goddamn
1990
Dragon Century
1988
Kamen Rider Heisei Generations Forever
2018
Hakugei: Legend of the Moby Dick
1997
Gundam Wing: The Endless Waltz
1998
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011
Twilight of the Dark Master
1997
Momotaros' King of the Crimson Castle
2008
Kamen Rider × Super Sentai: Super Hero Wars
2012
Spirit Warrior
1988
Balthus: Tia's Radiance
1988
Nightsong of Splendor
1989
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
The Birth of Kitaro: The Mystery of GeGeGe
2023
Mazinger Z: Infinity
2017
Bomberman B-Daman Bakugaiden
1998
Harlock Saga - The Ring of the Nibelungs
1999
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
Shonen Onmyouji
2006
Kamen Rider Kiva: King of the Castle in the Demon World
2008
Violinist of Hamelin: The Movie
1996
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
Akai Hayate
1991
Darkness of the Sea, Shadow of the Moon
1989
Kamen Rider Den-O & Kiva: Climax Deka
2008
Nyūin Bokki Monogatari Ojiji ni!
1991
Reign: The Conqueror Movie
2000
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
Kamen Rider Den-O The Movie: I'm Born!
2007
Nadia: The Secret of Blue Water - Nautilus Story II
1991
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017
Nadia: The Secret of Blue Water - The Motion Picture
1991
Imagin Anime: Momotaros Forever!/Imajin Terminal Station
2008
Legend of Heavenly Sphere Shurato: The Secret Feud of Creation
1991
Pet Shop of Horrors
1999
Princess Army: Wedding Combat
1992
Naruto OVA 12: The Day Naruto Became Hokage
2016
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~
2011
Hades Project: Zeorymer Separation
1988
Angel Cop
1989
Inferious Interplanetary War Chronicle - Condition Green
1991
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017
Ultraman Super Fighter Legend
1996
Love Wedge 2
1994
Bio Hunter
1995
Farewell Kamen Rider Den-O: Final Countdown
2008
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
Campus Special Investigator Hikaruon
1987
Hades Project: Zeorymer Extinction
1989
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
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 Red: Zero's Star Twinkle
2010
Animation Store Manager
2002
Kamen Rider Den-O: Final Trilogy Special Edition
2008
Dragoon
1997
Yawara! Go Get 'Em, Wimpy Kids!!
1992
Love Wedge 1
1992
Ryokunohara Labyrinth - Sparkling Phantom
1990
The Weathering Continent
1992
Kamen Rider Den-O: Singing, Dancing, Great Training!!
2007
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
2022
Zillion: Burning Night
1988
Call Me Tonight
1986
Momotaros' King of the Crimson Castle
2008
Moonlight Pierce
1991
Marina the Manga Artist Goes to Camelot
1990
Kamen Rider Den-O: Final Stage
2007
Kiss Me on the Apple of My Eye
1993
Heart-Coloured Killer Ticket
1990
Baby Felix & Friends
2000
Maryuu Senki
1987
Oruorane the Cat Player
1992
Higurashi: When They Cry - Outbreak
2013
Saiyuki: Requiem
2001
Calico Cat Holmes and the Lord of the Haunted Castle
1992
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!!
2007
Demon Hunter Makaryūdo
1989
Suikoden Demon Century
1993
Cinderella Express
1989
Kaze wo Nuke!
1988
Scarlet Demon
1989
Genocyber
1994
Momotaros' Summer Vacation
2007
Dragon Century
1988
I'm Not an Angel!
1994
Sunlight All Around! Ka - su - mi: You Were in My Dreams
1988
Yuukan Club
1991
TO-Y
1987
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
2010
Kamen Rider Kiva & Den-O: DenLiner, Into Space!
2009
Yawara! Atlanta Special
1996
Milky Passion: Dougenzaka - The Castle of Love
1990
Hisashi Eguchi's Kotobuki Goro Show
1991
Handsome Girl
1991
Midoriyama High School, Koshien Edition (Movie)
1990
Trusty Ginjiro
1991
Download: Devil's Circuit
1992
The Samurai
1987
Goddamn
1990
Dorami-chan: A Blue Straw Hat
1994
Kamen Rider Decade: Final Stage
2010
The End of the Century Darling
1996
10th Anniversary Project: Masked Rider LIVE & SHOW
2009
TOKYO CITY Melhen 2
1990
Saiyuki Interactive
2002
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2009
Wild 7: Biker Knights
1994
Untitled Super Space Sheriff Gavan Infinity Summer Movie
2026
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
2026
Paranoia Agent: Part 1
2004
Chimera: Angel of Death
1997