Toshihiko Seki

Born: 1962-06-11 in Sendai, Japon

Known For: 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.

Filmography

2026

My Ribdiculous Reincarnation
PROJECT R.E.D. as GavarionTrigger / CosmoGavarion (voice)
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi as Cosmo Gavarion System Voice / Gavarion Trigger System Voice
Super Space Sheriff Gavan Infinity: Jo-Chaku Course as Gavarion Trigger System Voice (voice)

2025

Demon Slayer: Kimetsu no Yaiba Infinity Castle as Muzan Kibutsuji (voice)
I Have a Crush at Work as Pastor (voice)
SANDA as Hifumi Ōshibu (voice)
Mashin Creator Wataru as Mr. Liar (voice)
U Takes Terra as Chongyue (Voice)

2024

Kaiju No. 8 as Kaiju No. 11 (voice)
Ranma1/2 as Mousse (voice)
I Parry Everything as Carew (voice)
Good Bye, Dragon Life as Dio (voice)
Nintama Rantarō: Invincible Master of the Dokutake Ninja as Hansuke Doi (voice)

2023

Rurouni Kenshin as Narration (voice)
PLUTO as Sahad (voice)
The Most Heretical Last Boss Queen: From Villainess to Savior as Clark Darwin (voice)
HIGH CARD as Norman Kingstat (voice)
Black Clover: Sword of the Wizard King as Conrad Leto (voice)
Onimusha as Kojiro Sasaki (voice)
The Birth of Kitaro: The Mystery of GeGeGe as Kitarou's Father (voice)

2018

Golden Kamuy as Kazuo Henmi (voice)
The Ryuo's Work is Never Done! as Kiyotaki Kousuke (voice)
Saint Seiya: Saintia Sho as Scorpio Milo (voice)
SWORD GAI: The Animation as Miura Takuma
Kamen Rider Heisei Generations Forever as Momotaros / Kamen Rider Den-O Sword Form (voice)

2017

The Laughing Salesman NEW as Shisao Kihara(Story2)
Mazinger Z: Infinity as Tetsuya Tsurugi (voice)
THE REFLECTION as Michael Holden (voice)
Kamen Rider × Super Sentai: Ultra Super Hero Wars as Momotaros - Kamen Rider Den-O Sword Form (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- as Momotaros

2016

Mob Psycho 100 as Morizo Ebihara (voice)
To Be Hero as Chinese Tohoku Muffler (voice)
Showa Genroku Rakugo Shinju as Eisuke Higuchi (voice)
Naruto OVA 12: The Day Naruto Became Hokage as Iruka Umino (voice)

2015

Saint Seiya: Soul of Gold as Scorpio Milo (voice)
Mobile Suit Gundam: The Origin II - Artesia's Sorrow as Char Aznable (voice)

2014

Space Dandy as Public Prosecutor (voice)
Cross Ange: Rondo of Angels and Dragons as Embryo (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai as Kamen Rider Den-O Sword Form (voice)

2013

Gingitsune: Messenger Fox of the Gods as Tatsuo Saeki (voice)
Triple Combination: Transformers Go! as Gekisōmaru (voice)
声優戦隊ボイストーム7 as (voice)
Hunter x Hunter: The Last Mission as Wing (voice)
Higurashi: When They Cry - Outbreak as Kyousuke Irie (voice)

2012

Glitter Force as Hiroshi Hoshizora
Road to Ninja: Naruto the Movie as Iruka Umino (voice)
Kamen Rider × Super Sentai: Super Hero Wars as Momotaros - Kamen Rider Den-O Sword Form (voice)

2011

Hunter x Hunter as Wing (voice)
Guilty Crown as Kurosu Ouma (voice)
Detective Conan: Quarter of Silence as Shogo Hikawa (voice)
Saiyuki Gaiden as Konzen Dōji (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders as Momotaros / Kamen Rider Den-O Sword Form (voice)
Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! as Hansuke Doi (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~ as Momotaros (voice)

2010

Katanagatari as Umigame Maniwa (voice)
Psychic Detective Yakumo as Isshin Saitō
Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates as Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral as Momotaros (voice)
Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle as Momotaros (voice)
Kamen Rider Decade: Final Stage as Momotaros / Kamen Rider Den-O (Sword Form)
Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010

2009

Dogs: Bullets & Carnage as Ernst Rammsteiner
Kamen Rider × Kamen Rider W & Decade: Movie War 2010 as Kamen Rider Den-O (voice)
Kamen Rider Decade: All Riders vs. Dai-Shocker as Momotaros / Kamen Rider Den-O (voice)
Cookin' Idol Ai! Mai! Main! as 柊修
Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship as Momotaros (voice)
Kamen Rider Kiva & Den-O: DenLiner, Into Space! as Momotaros (voice)
10th Anniversary Project: Masked Rider LIVE & SHOW as Kamen Rider Den-O Sword Form (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- as Momotaros (voice)

2008

A Certain Magical Index as Aleister Crowley (voice)
Sekirei as Hiroto Minaka
Blade of the Immortal as Souri (voice)
Kamen Rider Den-O: Imagin Anime as Momotaros (voice)
Kamen Rider Kiva: King of the Castle in the Demon World as Penetentiary Officer Sanjo
Farewell Kamen Rider Den-O: Final Countdown as Momotaros (voice)
Kamen Rider Den-O & Kiva: Climax Deka as Momotaros (voice)
Momotaros' King of the Crimson Castle as Momotaros (voice)
Kamen Rider Den-O: Final Trilogy Special Edition as Momotaros (voice)
Imagin Anime: Momotaros Forever!/Imajin Terminal Station as Momotaros (voice)
Momotaros' King of the Crimson Castle as Momotaros (voice)

2007

Naruto Shippūden as Iruka Umino (voice)
Kamen Rider Den-O as Momotaros (voice)
Saiyuki Reload: Burial as Genjō Sanzō (voice)
Kamen Rider Den-O The Movie: I'm Born! as Momotaros (voice)
Kamen Rider Den-O: Singing, Dancing, Great Training!! as Momotaros (voice)
Kamen Rider Den-O: Final Stage as Momotaros
Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!! as Momotaros (voice)
Momotaros' Summer Vacation as Momotaros (voice)

2006

Higurashi: When They Cry as Kyousuke Irie (voice)
Shonen Onmyouji
Loving Angel Angelique as Luva

2005

MÄR: Märchen Awakens Romance as Danna Toramizu
My-Otome as Rad (voice)

2004

Bleach as Aaroniero Arruruerie (voice)
Samurai Champloo as Yamane (voice)
My-Hime as Reito Kanzaki (voice)
Paranoia Agent as Mitsuhiro Maniwa (voice)
Gin'yuu Mokushiroku Meine Liebe as Ludwig Herzog von Mohn nahe Liechtenstein (voice)
Paranoia Agent: Part 1 as まにわみつひろ

2003

Requiem from the Darkness as Momosuke Yamaoka (voice)

2002

Naruto as Iruka Umino (voice)
Mobile Suit Gundam SEED as Rau Le Creuset (voice)
Saint Seiya: The Hades Chapter as Milo (voice)
Angelique: Twin Collection as Luva (voice)
Mirage of Blaze as Takaya Ohgi (voice)
Animation Store Manager as Ryuu Raiba (voice)
Saiyuki Interactive

2001

Saiyuki: Requiem as Genjo Sanzo (voice)

2000

Saiyuki as Genjo Sanzo (voice)
Descendants of Darkness as Yutaka Watari (voice)
Reign: The Conqueror Movie as Alexander
Baby Felix & Friends as Felix The Cat

1999

Reign: The Conqueror as Alexander (voice)
Bビーダマン爆外伝V as Kurobon
Harlock Saga - The Ring of the Nibelungs
Pet Shop of Horrors as Count D (voice)

1998

TRIGUN as Legato Bluesummers (voice)
Nightwalker: The Midnight Detective as Bait
Outlaw Star as Fred (voice)
Bomberman B-Daman Bakugaiden
Gundam Wing: The Endless Waltz as Duo Maxwell (voice)

1997

Hyper Police as Sakunoshin Chikura
Hakugei: Legend of the Moby Dick
Twilight of the Dark Master as Shijo Tsunami (voice)
Dragoon as Rain Keeves Fearudo (voice)
Chimera: Angel of Death as Ron

1996

B'T X as Quatro (voice)
The Legend of Zorro as Don Diego de la Vega / Zorro
X: The Movie as Shougo
Special Duty Combat Unit Shinesman as Shujin Seki (voice)
Ultraman Super Fighter Legend as Ultraseven / Ultraman Leo (voice)
Violinist of Hamelin: The Movie as Raiel (voice)
Yawara! Atlanta Special
The End of the Century Darling as Todorokki Kouhei (voice)

1995

Mobile Suit Gundam Wing as Duo Maxwell (voice)
Udauda Yatteru Hima wa Nee! as (voice)
Bio Hunter as Komada

1994

The Irresponsible Captain Tylor OVA as Dom (voice)
Natsuki Crisis as Kyōtarō Himuro
Wild 7 as Dairoku Hiba
Wild 7: Biker Knights as Dairoku Hiba
Dorami-chan: A Blue Straw Hat as Crow (voice)
Genocyber as Sakomizu (voice)
Love Wedge 2 as Riki (voice)
I'm Not an Angel! as Bunta Kouno (voice)

1993

Ninja Boy Rantaro as Hansuke Doi
Black Jack as Tokio Umetani (voice)
The Irresponsible Captain Tylor as Ru Baraba Dom
Aoki Densetsu Shoot! as Akihiko Himuro (voice)
Please Save My Earth as Mikuro Yakushimaru (voice)
Ninja Scroll as Yurimaru (voice)
Ocean Waves as Yutaka Matsuno (voice)
Kiss Me on the Apple of My Eye as Naoto (voice)
Suikoden Demon Century as Takateru Suga (voice)

1992

Bastard!!
Ai no Kusabi as Riki (voice)
Ranma 1/2 the Movie 2: Nihao My Concubine as Mousse (voice)
D-1 Devastator as 谷田辺了
Princess Army: Wedding Combat as Yuuya Hashiba
Calico Cat Holmes and the Lord of the Haunted Castle as Yoshitaro Katayama (voice)
The Weathering Continent as Tieh (voice)
Download: Devil's Circuit as Sid (voice)
Yawara! Go Get 'Em, Wimpy Kids!! as (voice)
Oruorane the Cat Player as The Cellist
Love Wedge 1 as Riki (voice)

1991

Future GPX Cyber Formula as Jotaro Kaga
Here Is Greenwood as Shinobu Tezuka (voice)
Detonator Orgun as Knock
Blazing Transfer Student as Noboru Takizawa (voice)
Legend of Heavenly Sphere Shurato: The Secret Feud of Creation as Shurato
Akai Hayate
Ranma 1/2 the Movie: Big Trouble in Nekonron, China as Mousse (voice)
Izumo as Izumo (voice)
Nadia: The Secret of Blue Water - The Motion Picture as Falt (voice)
Nyūin Bokki Monogatari Ojiji ni!
Inferious Interplanetary War Chronicle - Condition Green as Soo Laform (voice)
Nadia: The Secret of Blue Water - Nautilus Story II as Fate (voice)
Handsome Girl as Ichiya Kumagai (voice)
Moonlight Pierce as Hiroshi Takama (voice)
Yuukan Club
Hisashi Eguchi's Kotobuki Goro Show as Piston Akagi (voice)
Trusty Ginjiro as Hideki Mitsui (voice)

1990

Nadia: The Secret of Blue Water as Fejto (voice)
The Hakkenden: Legend of the Dog Warriors as Shino Inuzuka (voice)
Goddamn as Hans Schultz
Goddamn as Hans Schultz
Marina the Manga Artist Goes to Camelot as Bijomaru Shizuka (voice)
Ryokunohara Labyrinth - Sparkling Phantom as Hiroki Imashi
Heart-Coloured Killer Ticket as Chuta Misora (voice)
Midoriyama High School, Koshien Edition (Movie)
Milky Passion: Dougenzaka - The Castle of Love as Ootsuki (voice)
TOKYO CITY Melhen 2

1989

Ranma ½ as Mousse (voice)
Yawara! as Matsuda / Eiji (voice)
Madö King Granzört as Grunwald
Shurato as Shurato
Dash! Yonkuro
Nightsong of Splendor
Darkness of the Sea, Shadow of the Moon as Katsuyuki Touma (voice)
Star Cat Full House
Angel Cop as Tachihara (voice)
Hades Project: Zeorymer Extinction as Masato Akitsu / Masaki Kihara (voice)
Demon Hunter Makaryūdo as Shou Kurogane (voice)
Scarlet Demon
Cinderella Express as Yuji Shimano

1988

Hades Project Zeorymer as (voice)
Armor Hunter Merowlink as PFC Cepres
F as Gunma Akagi (voice)
Balthus: Tia's Radiance as Eud (voice)
Spirit Warrior as Kujaku (voice)
Dragon Century as Carmine
Hades Project: Zeorymer Separation as Masato Akitsu (voice)
Sunlight All Around! Ka - su - mi: You Were in My Dreams as Reporter B (voice)
Zillion: Burning Night as J.J. (voice)
Kaze wo Nuke!
Dragon Century as Carmine (voice)

1987

Zillion as JJ
Evil Dragon War Chronicles as 錦繍 (voice)
The Samurai as Takeshi Chimatsuri
Campus Special Investigator Hikaruon as Hikaru Shihodo / Hikaruon (voice)
Maryuu Senki
TO-Y as Shouji (voice)

1986

Castle in the Sky as Additional Voices (voice)
Call Me Tonight as Hayata (voice)

1985

Magical Emi, the Magic Star as Customer A (voice)

1971

Kamen Rider as Kamen Rider Den-O (voice)