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