Toshihiko Seki
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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
Credits
Demon Slayer: Kimetsu no Yaiba Infinity Castle (2025)
as Muzan Kibutsuji (voice)
Castle in the Sky (1986)
as Additional Voices (voice)
Black Clover: Sword of the Wizard King (2023)
as Conrad Leto (voice)
Road to Ninja: Naruto the Movie (2012)
as Iruka Umino (voice)
Detective Conan: Quarter of Silence (2011)
as Shogo Hikawa (voice)
My Hero Academia: World Heroes' Mission (2021)
as Eddie Soul (voice)
Mazinger Z: Infinity (2017)
as Tetsuya Tsurugi (voice)
Ocean Waves (1993)
as Yutaka Matsuno (voice)
Ninja Scroll (1993)
as Yurimaru (voice)
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond (2019)
as Muzan Kibutsuji (voice)
Hunter x Hunter: The Last Mission (2013)
as Wing (voice)
X (1996)
as Shougo
Gundam Wing: The Endless Waltz (1998)
as Duo Maxwell (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine (1992)
as Mousse (voice)
Mobile Suit Gundam: The Origin II - Artesia's Sorrow (2015)
as Char Aznable (voice)
Saiyuki: Requiem (2001)
as Genjo Sanzo (voice)
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc (2022)
as Muzan Kibutsuji (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars (2017)
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Ranma 1/2 the Movie: Big Trouble in Nekonron, China (1991)
as Mousse (voice)
The Birth of Kitaro: The Mystery of GeGeGe (2023)
as Kitarou's Father (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja (2024)
as Hansuke Doi (voice)
Kamen Rider × Kamen Rider W & Decade: Movie War 2010 (2009)
as Kamen Rider Den-O (voice)
Kamen Rider × Super Sentai: Super Hero Wars (2012)
as Momotaros - Kamen Rider Den-O Sword Form (voice)
Balthus: Tia's Radiance (1988)
as Eud (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle (2010)
as Momotaros (voice)
Love Wedge 2 (1994)
as Riki (voice)
Inferious Interplanetary War Chronicle - Condition Green (1991)
as Soo Laform (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker (2009)
as Momotaros / Kamen Rider Den-O (voice)
Naruto OVA 12: The Day Naruto Became Hokage (2016)
as Iruka Umino (voice)
Kamen Rider Kiva: King of the Castle in the Demon World (2008)
as Penetentiary Officer Sanjo
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates (2010)
as Momotaros (voice)
Nadia: The Secret of Blue Water - The Motion Picture (1991)
as Falt (voice)
Kamen Rider Heisei Generations Forever (2018)
as Momotaros / Kamen Rider Den-O Sword Form (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders (2011)
as Momotaros / Kamen Rider Den-O Sword Form (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral (2010)
as Momotaros (voice)
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010 (2010)
Actor
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles (2021)
as Momotaros (voice) / Kamen Rider Den-O (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014)
as Kamen Rider Den-O Sword Form (voice)
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi (2026)
as Cosmo Gavarion System Voice / Gavarion Trigger System Voice
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship (2009)
as Momotaros (voice)
Campus Special Investigator Hikaruon (1987)
as Hikaru Shihodo / Hikaruon (voice)
Kamen Rider Den-O The Movie: I'm Born! (2007)
as Momotaros (voice)
Kamen Rider Den-O & Kiva: Climax Deka (2008)
as Momotaros (voice)
Baby Felix & Friends (2000)
as Felix The Cat
Twilight of the Dark Master (1997)
as Shijo Tsunami (voice)
10th Anniversary Project: Masked Rider LIVE & SHOW (2009)
as Kamen Rider Den-O Sword Form (voice)
Farewell Kamen Rider Den-O: Final Countdown (2008)
as Momotaros (voice)
Wild 7: Biker Knights (1994)
as Dairoku Hiba
Imagin Anime: Momotaros Forever!/Imajin Terminal Station (2008)
as Momotaros (voice)
Yawara! Atlanta Special (1996)
Actor
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~ (2011)
as Momotaros (voice)
Bio Hunter (1995)
as Komada
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- (2017)
as Momotaros
Momotaros' Summer Vacation (2007)
as Momotaros (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! (2011)
as Hansuke Doi (voice)
Angel Cop (1989)
as Tachihara (voice)
Ultraman Super Fighter Legend (1996)
as Ultraseven / Ultraman Leo (voice)
Suikoden Demon Century (1993)
as Takateru Suga (voice)
Goddamn (1990)
as Hans Schultz
Sunlight All Around! Ka - su - mi: You Were in My Dreams (1988)
as Reporter B (voice)
Super Space Sheriff Gavan Infinity: Jo-Chaku Course (2026)
as Gavarion Trigger System Voice (voice)
The Weathering Continent (1992)
as Tieh (voice)
The Irresponsible Captain Tylor: Tylor's War (1994)
as Ru Baraba Dom (voice)
Download: Devil's Circuit (1992)
as Sid (voice)
The Samurai (1987)
as Takeshi Chimatsuri
Momotaros' King of the Crimson Castle (2008)
as Momotaros (voice)
Kaze wo Nuke! (1988)
Actor
Higurashi: When They Cry - Outbreak (2013)
as Kyousuke Irie (voice)
Zillion: Burning Night (1988)
as J.J. (voice)
Hisashi Eguchi's Kotobuki Goro Show (1991)
as Piston Akagi (voice)
Marina the Manga Artist Goes to Camelot (1990)
as Bijomaru Shizuka (voice)
Ryokunohara Labyrinth - Sparkling Phantom (1990)
as Hiroki Imashi
Hades Project: Zeorymer Separation (1988)
as Masato Akitsu (voice)
Moonlight Pierce (1991)
as Hiroshi Takama (voice)
Reign: The Conqueror Movie (2000)
as Alexander
Violinist of Hamelin: The Movie (1996)
as Raiel (voice)
Kamen Rider Den-O: Final Trilogy Special Edition (2008)
as Momotaros (voice)
Nadia: The Secret of Blue Water - Nautilus Story II (1991)
as Fate (voice)
Cinderella Express (1989)
as Yuji Shimano
Love Wedge 1 (1992)
as Riki (voice)
Hades Project: Zeorymer Extinction (1989)
as Masato Akitsu / Masaki Kihara (voice)
I'm Not an Angel! (1994)
as Bunta Kouno (voice)
TO-Y (1987)
as Shouji (voice)
Call Me Tonight (1986)
as Hayata (voice)
The End of the Century Darling (1996)
as Todorokki Kouhei (voice)
Yawara! Go Get 'Em, Wimpy Kids!! (1992)
as (voice)
Kamen Rider Den-O: Singing, Dancing, Great Training!! (2007)
as Momotaros (voice)
Genocyber (1994)
as Sakomizu (voice)
Kiss Me on the Apple of My Eye (1993)
as Naoto (voice)
Trusty Ginjiro (1991)
as Hideki Mitsui (voice)
Milky Passion: Dougenzaka - The Castle of Love (1990)
as Ootsuki (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O! (2020)
as Momotaros (voice)
Kamen Rider Den-O: Final Stage (2007)
as Momotaros
Heart-Coloured Killer Ticket (1990)
as Chuta Misora (voice)
Calico Cat Holmes and the Lord of the Haunted Castle (1992)
as Yoshitaro Katayama (voice)
Midoriyama High School, Koshien Edition (Movie) (1990)
Actor
Kamen Rider Kiva & Den-O: DenLiner, Into Space! (2009)
as Momotaros (voice)
Demon Hunter Makaryūdo (1989)
as Shou Kurogane (voice)
Saiyuki Interactive (2002)
Actor
Oruorane the Cat Player (1992)
as The Cellist
Yuukan Club (1991)
Actor
Paranoia Agent: Part 1 (2004)
as まにわ みつひろ
Dragon Century (1988)
as Carmine (voice)
Dorami-chan: A Blue Straw Hat (1994)
as Crow (voice)
Scarlet Demon (1989)
Actor
Animation Store Manager (2002)
as Ryuu Raiba (voice)
TOKYO CITY Melhen 2 (1990)
Actor
Handsome Girl (1991)
as Ichiya Kumagai (voice)
Kamen Rider Decade: Final Stage (2010)
as Momotaros / Kamen Rider Den-O (Sword Form)
Maryuu Senki (1987)
Actor
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!! (2007)
as Momotaros (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- (2009)
as Momotaros (voice)
Chimera: Angel of Death (1997)
as Ron (voice)