Toshihiko Seki
Known for
Toshihiko Seki is a Japanese voice actor born in Sendai, known for his versatility across heroic and villainous roles in anime. He voiced Iruka Umino, the caring academy teacher, throughout the 'Naruto' and 'Naruto Shippuden' franchises, and later took on the terrifying antagonist Muzan Kibutsuji in 'Demon Slayer: Kimetsu no Yaiba'. His extensive career also includes 'Bleach' and 'Hunter x Hunter'. Seki remains a respected veteran voice actor whose range spans gentle mentors to menacing demons.
Toshihiko Seki
94 Movies
115 Series
Toshihiko Seki is a Japanese voice actor born in Sendai, known for his versatility across heroic and villainous roles in anime. He voiced Iruka Umino, the caring academy teacher, throughout the 'Naruto' and 'Naruto Shippuden' franchises, and later took on the terrifying antagonist Muzan Kibutsuji in 'Demon Slayer: Kimetsu no Yaiba'. His extensive career also includes 'Bleach' and 'Hunter x Hunter'. Seki remains a respected veteran voice actor whose range spans gentle mentors to menacing demons.
Movies
Plays Muzan Kibutsuji (voice)
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
Plays Additional Voices (voice)
Castle in the Sky
1986
Plays Conrad Leto (voice)
Black Clover: Sword of the Wizard King
2023
Plays Eddie Soul (voice)
My Hero Academia: World Heroes' Mission
2021
Plays Iruka Umino (voice)
Road to Ninja: Naruto the Movie
2012
Plays Tetsuya Tsurugi (voice)
Mazinger Z: Infinity
2017
Plays Yurimaru (voice)
Ninja Scroll
1993
Plays Muzan Kibutsuji (voice)
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
Plays Mousse (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine
1992
Plays Wing (voice)
Hunter x Hunter: The Last Mission
2013
Plays Mousse (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
Plays Genjo Sanzo (voice)
Saiyuki: Requiem
2001
Plays Duo Maxwell (voice)
Gundam Wing: The Endless Waltz
1998
Plays Char Aznable (voice)
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
2015
Plays Shougo
X
1996
Plays Kamen Rider Den-O (voice)
Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009
Plays Momotaros / Kamen Rider Den-O Sword Form (voice)
Kamen Rider Heisei Generations Forever
2018
Plays Eud (voice)
Balthus: Tia's Radiance
1988
Plays Momotaros - Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017
Plays Muzan Kibutsuji (voice)
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
Plays Shijo Tsunami (voice)
Twilight of the Dark Master
1997
Plays Momotaros / Kamen Rider Den-O (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
Plays Takeshi Chimatsuri
The Samurai
1987
Plays Iruka Umino (voice)
Naruto OVA 12: The Day Naruto Became Hokage
2016
Plays Momotaros (voice) / Kamen Rider Den-O (voice)
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021
Plays Momotaros (voice)
Kamen Rider Den-O & Kiva: Climax Deka
2008
Plays Kitarou's Father (voice)
The Birth of Kitaro: The Mystery of GeGeGe
2023
Plays Momotaros (voice)
Kamen Rider Den-O The Movie: I'm Born!
2007
Plays Momotaros (voice)
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship
2009
Plays Momotaros - Kamen Rider Den-O Sword Form (voice)
Kamen Rider × Super Sentai: Super Hero Wars
2012
Plays Penetentiary Officer Sanjo
Kamen Rider Kiva: King of the Castle in the Demon World
2008
Plays Komada
Bio Hunter
1995
Plays Momotaros / Kamen Rider Den-O Sword Form (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011
Plays Kamen Rider Den-O Sword Form (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014
Plays Hansuke Doi (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck!
2011
Plays Hansuke Doi (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024
Plays Hayata (voice)
Call Me Tonight
1986
Plays Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle
2010
Plays Tachihara (voice)
Angel Cop
1989
Plays Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates
2010
Plays Momotaros (voice)
Farewell Kamen Rider Den-O: Final Countdown
2008
Plays Falt (voice)
Nadia: The Secret of Blue Water - The Motion Picture
1991
Plays Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral
2010
Plays Tieh (voice)
The Weathering Continent
1992
Plays Shouji (voice)
TO-Y
1987
Plays Momotaros (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020
Plays Riki (voice)
Love Wedge 1
1992
Plays Kyousuke Irie (voice)
Higurashi: When They Cry - Outbreak
2013
Plays (voice)
Yawara! Go Get 'Em, Wimpy Kids!!
1992
Plays Sid (voice)
Download: Devil's Circuit
1992
TV Shows
Plays Hansuke Doi
Ninja Boy Rantaro
1993
Plays Iruka Umino (voice)
Naruto Shippūden
2007
Plays Iruka Umino (voice)
Naruto
2002
Plays Genjo Sanzo (voice)
Saiyuki
2000
Plays Matsuda / Eiji (voice)
Yawara!
1989
Plays Danna Toramizu
MÄR: Märchen Awakens Romance
2005
Plays Jotaro Kaga
Future GPX Cyber Formula
1991
Plays Kazuo Henmi (voice)
Golden Kamuy
2018
Plays Akihiko Himuro (voice)
Aoki Densetsu Shoot!
1993
Plays Rau Le Creuset (voice)
Mobile Suit Gundam SEED
2002
Plays Momotaros (voice)
Kamen Rider
1971
Plays Don Diego de la Vega / Zorro
The Legend of Zorro
1996
Plays Kurobon
Bビーダマン爆外伝V
1999
Plays Duo Maxwell (voice)
Mobile Suit Gundam Wing
1995
Plays Momotaros (voice)
Kamen Rider Den-O
2007
Plays Hiroshi Hoshizora
Glitter Force
2012
Plays Grunwald
Madö King Granzört
1989
Plays Fejto (voice)
Nadia: The Secret of Blue Water
1990
Plays Kyousuke Irie (voice)
Higurashi: When They Cry - NEW
2020
Plays Shurato
Shurato
1989
Plays Momotaros (voice)
Kamen Rider Den-O: Imagin Anime
2008
Plays JJ
Zillion
1987
Plays Gunma Akagi (voice)
F
1988
Plays Yamane (voice)
Samurai Champloo
2004
Plays Reito Kanzaki (voice)
My-Hime
2004
Plays Ru Baraba Dom
The Irresponsible Captain Tylor
1993
Plays Ludwig Herzog von Mohn nahe Liechtenstein (voice)
Gin'yuu Mokushiroku Meine Liebe
2004
Plays Fred (voice)
Outlaw Star
1998
Plays Rad (voice)
My-Otome
2005
Plays Hiroto Minaka
Sekirei
2008
Latest Trailers
Watch Trailer
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
Full Filmography
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
Cosmo Gavarion System Voice / Gavarion Trigger System Voice
2026
Film
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
Gavarion Trigger System Voice (voice)
2026
Film
PROJECT R.E.D.
GavarionTrigger / CosmoGavarion (voice) · 23 episodes
2026–
TV
SANDA
Hifumi Ōshibu (voice) · 12 episodes
2025–
TV
Demon Slayer: Kimetsu no Yaiba Infinity Castle
Muzan Kibutsuji (voice)
2025
Film
U Takes Terra
Chongyue (Voice) · 1 episode
2025–
TV
Mashin Creator Wataru
Mr. Liar (voice) · 2 episodes
2025–
TV
I Have a Crush at Work
Pastor (voice) · 1 episode
2025–
TV
Nintama Rantarō: Invincible Master of the Dokutake Ninja
Hansuke Doi (voice)
2024
Film
Photos
Frequently Asked Questions
How old is Toshihiko Seki and where are they from?
Toshihiko Seki is 64 years old, born on June 11, 1962 in Sendai, Japon.
What are the most famous roles of Toshihiko Seki?
Toshihiko Seki is best known for roles in Castle in the Sky, Demon Slayer: Kimetsu no Yaiba Infinity Castle, Road to Ninja: Naruto the Movie.
How many movies has Toshihiko Seki been in?
Over a 40-year career (since 1986), Toshihiko Seki has appeared in 94 movies and 115 TV shows.
What was Toshihiko Seki's first movie?
The career of Toshihiko Seki began with Call Me Tonight (1986).
What is Toshihiko Seki's most recent movie or series?
Toshihiko Seki's most recent release is Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi, which premiered on July 24, 2026.
What TV shows has Toshihiko Seki appeared in?
On television, Toshihiko Seki has appeared in Naruto Shippūden, Demon Slayer: Kimetsu no Yaiba, Naruto, Bleach.
Toshihiko Seki
1962-06-11 · Sendai, Japon
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.