Personal Info

Known For

Acting

Known Credits

225

Gender

Male

Birthday

1962-06-11 (62 years old)

Place of Birth

Sendai, Miyagi Prefecture, Japan

Also Known As

関俊彦
せきとしひこ
关俊彦

Toshihiko Seki

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

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Acting

2025

Demon Slayer: Kimetsu no Yaiba Infinity Castle as Muzan Kibutsuji (voice)

2024		Nintama Rantaro the Movie: The Dokutake Ninja Team's Strongest Strategist as Hansuke Doi (voice)
2024		I Parry Everything as Carew (voice)

2023		The Birth of Kitaro: The Mystery of GeGeGe as Kitarou's Father (voice)
2023		Onimusha as Kojiro Sasaki (voice)
2023		PLUTO as Sahad (voice)
2023		PLUTO as Pluto (voice)
2023		Rurouni Kenshin as Narration (voice)
2023		The Most Heretical Last Boss Queen: From Villainess to Savior as Clark Darwin (voice)
2023		Black Clover: Sword of the Wizard King as Conrad Leto (voice)
2023		HIGH CARD as Norman Kingstat (voice)

2022		Demon Slayer: Kimetsu no Yaiba - Asakusa Arc as Muzan Kibutsuji (voice)
2022		Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O as Momotaros (voice)

2021		My Hero Academia: World Heroes' Mission as Eddie Soul (voice)
2021		Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles as Momotaros (voice) / Kamen Rider Den-O (voice)

2020		Higurashi: When They Cry - NEW as Kyousuke Irie (voice)
2020		Kamen Rider Den-O: The Birth of Pretty Den-O! as Momotaros
2020		The Misfit of Demon King Academy as Ahide Alobo Agatze (voice)

2019		Ascendance of a Bookworm as Justucs (voice)
2019		SAINT SEIYA: Knights of the Zodiac as Scorpio Milo (voice)
2019		Sarazanmai as Yuri Kamome
2019		Demon Slayer: Kimetsu no Yaiba as Muzan Kibutsuji (voice)
2019		Demon Slayer: Kimetsu no Yaiba - Sibling's Bond as Muzan Kibutsuji (voice)
2019		Star☆Twinkle PreCure as Toto Hagoromo (voice)

2018		Kamen Rider Heisei Generations FOREVER as Momotaros / Kamen Rider Den-O Sword Form (voice)
2018		Saint Seiya: Saintia Sho as Scorpio Milo (voice)
2018		Golden Kamuy as Kazuo Henmi (voice)
2018		SWORD GAI: The Animation as Miura Takuma
2018		The Ryuo's Work is Never Done! as Kiyotaki Kousuke (voice)
2018		Pop Team Epic as Popuko (voice)

2017		Mazinger Z: Infinity as Tetsuya Tsurugi (voice)
2017		Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- as Momotaros
2017		THE REFLECTION as Michael Holden (voice)
2017		The Laughing Salesman NEW as Shisao Kihara(Story2)
2017		Kamen Rider × Super Sentai: Ultra Super Hero Wars as Momotaros - Kamen Rider Den-O Sword Form (voice)

2016		To Be Hero as Chinese Tohoku Muffler (voice)
2016		Mob Psycho 100 as Morizo Ebihara (voice)
2016		Mob Psycho 100 as Musashi Goda (voice)
2016		The Day Naruto Became Hokage as Iruka Umino (voice)
2016		Showa Genroku Rakugo Shinju as Eisuke Higuchi (voice)

2015		Mobile Suit Gundam: The Origin II - Artesia's Sorrow as Char Aznable (voice)
2015		Saint Seiya: Soul of Gold as Scorpio Milo (voice)

2014		Cross Ange: Rondo of Angels and Dragons as Embryo (voice)
2014		Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai as Kamen Rider Den-O Sword Form (voice)
2014		Space Dandy as Public Prosecutor (voice)

2013		Hunter x Hunter: The Last Mission as Wing (voice)
2013		Gingitsune: Messenger Fox of the Gods as Tatsuo Saeki (voice)
2013		声優戦隊ボイストーム7 as (voice)
2013		Higurashi: When They Cry - Kaku: Outbreak as Kyousuke Irie (voice)
2013		Triple Combination: Transformers Go! as Gekisōmaru (voice)

2012		Road to Ninja: Naruto the Movie as Iruka Umino (voice)
2012		Kamen Rider × Super Sentai: Super Hero Wars as Momotaros - Kamen Rider Den-O Sword Form (voice)
2012		Glitter Force as Hiroshi Hoshizora

2011		機動戦士ガンダムSEED - HDリマスター as 劳·鲁·克鲁泽
2011		機動戦士ガンダムSEED - HDリマスター as 雷·扎·巴雷尔
2011		Hunter x Hunter as Wing (voice)
2011		Detective Conan: Quarter of Silence as Shogo Hikawa (voice)
2011		OOO, Den-O, All Riders: Let's Go Kamen Riders as Momotaros / Kamen Rider Den-O Sword Form (voice)
2011		Saiyuki Gaiden as Konzen Dōji (voice)
2011		Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! as Hansuke Doi (voice)
2011		OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~ as Momotaros (voice)

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

2009		Kamen Rider × Kamen Rider W & Decade: Movie War 2010 as Kamen Rider Den-O (voice)
2009		Kamen Rider Decade: All Riders vs. Dai-Shocker as Momotaros / Kamen Rider Den-O (voice)
2009		Dogs: Bullets & Carnage as Ernst Rammsteiner
2009		Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship as Momotaros (voice)
2009		Cookin' Idol Ai! Mai! Main! as 柊修
2009		Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- as Momotaros (voice)
2009		Kamen Rider Kiva & Den-O: DenLiner, Into Space! as Momotaros (voice)

2008		Imagin Anime: Momotaros Forever!/Imajin Terminal Station as Momotaros (voice)
2008		A Certain Magical Index as Aleister Crowley (voice)
2008		Farewell Kamen Rider Den-O: Final Countdown as Momotaros (voice)
2008		Kamen Rider Kiva: King of the Castle in the Demon World as Penetentiary Officer Sanjo
2008		Momotaros' King of the Crimson Castle as Momotaros (voice)
2008		Kamen Rider Den-O: Final Trilogy Special Edition as Momotaros (voice)
2008		Momotaros' King of the Crimson Castle as Momotaros (voice)
2008		Blade of the Immortal as Souri (voice)
2008		Sekirei as Hiroto Minaka
2008		Kamen Rider Den-O: Imagin Anime as Momotaros (voice)
2008		Kamen Rider Den-O & Kiva: Climax Deka as Momotaros (voice)

2007		Kamen Rider Den-O: Final Stage as Momotaros
2007		Kamen Rider Den-O: Singing, Dancing, Great Training!! as Momotaros (voice)
2007		Kamen Rider Den-O The Movie: I’m Born! as Momotaros (voice)
2007		Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!! as Momotaros (voice)
2007		Momotaros' Summer Vacation as Momotaros (voice)
2007		Saiyuki Reload: Burial as Genjō Sanzō (voice)
2007		Naruto Shippūden as Iruka Umino (voice)
2007		Kamen Rider Den-O as Momotaros (voice)

2006		Loving Angel Angelique as Luva
2006		Higurashi: When They Cry as Kyousuke Irie (voice)

2005

MÄR: Märchen Awakens Romance as Danna Toramizu

2004		Gin'yuu Mokushiroku Meine Liebe as Ludwig Herzog von Mohn nahe Liechtenstein (voice)
2004		Bleach as Aaroniero Arruruerie (voice)
2004		My-Hime as Reito Kanzaki (voice)
2004		Samurai Champloo as Yamane (voice)
2004		Paranoia Agent as Mitsuhiro Maniwa (voice)

2003

Requiem from the Darkness as Momosuke Yamaoka (voice)

2002		Saint Seiya: The Hades Chapter as Milo (voice)
2002		Mobile Suit Gundam SEED as Rau Le Creuset (voice)
2002		Mobile Suit Gundam SEED as Rey Za Burrel (voice)
2002		Naruto as Iruka Umino (voice)
2002		Gensomaden Saiyuki: A Sin of Hope as Genjo Sanzo (voice)
2002		Animation Store Manager as Ryuu Raiba (voice)
2002		Angelique: Twin Collection as Luva (voice)
2002		Mirage of Blaze as Takaya Ohgi (voice)

2001

Gensomaden Saiyuki Requiem: For the One Not Chosen as Genjo Sanzo (voice)

2000		Reign: The Conqueror Movie as Alexander
2000		Descendants of Darkness as Yutaka Watari (voice)
2000		Vampire Hunter D: Bloodlust as Grove Marcus
2000		Saiyuki as Konzen Douji (voice)
2000		Saiyuki as Genjo Sanzo (voice)
2000		Baby Felix & Friends as Felix The Cat

1999		Reign: The Conqueror as Alexander (voice)
1999		Pet Shop of Horrors as Count D
1999		Bビーダマン爆外伝V as Kurobon

1998		Gundam Wing: The Endless Waltz as Duo Maxwell (voice)
1998		Nightwalker: The Midnight Detective as Bait
1998		TRIGUN as Legato Bluesummers (voice)
1998		Bomberman B-Daman Bakugaiden
1998		Twilight of the Dark Master as Shijo Tsunami
1998		Outlaw Star as Fred (voice)

1997		Chimera: Angel of Death as Ron
1997		Dragoon as Rain Keeves Fearudo (voice)
1997		Hakugei: Legend of the Moby Dick
1997		Hyper Police as Sakunoshin Chikura

1996		Ultraman Super Fighter Legend as Ultraseven / Ultraman Leo (voice)
1996		X: The Movie as Shougo
1996		Yawara! Atlanta Special
1996		Violinist of Hamelin: The Movie as Raiel (voice)
1996		B'T X as Quatro (voice)
1996		The Legend of Zorro as Don Diego de la Vega / Zorro
1996		Special Duty Combat Unit Shinesman as Shujin Seki (voice)
1996		The End of the Century Darling as Todorokki Kouhei

1995		Bio Hunter as Komada
1995		Mobile Suit Gundam Wing as Duo Maxwell (voice)
1995		Udauda Yatteru Hima wa Nee! as (voice)

1994		Wild 7: Biker Knights as Dairoku Hiba
1994		Wild 7 as Dairoku Hiba
1994		The Irresponsible Captain Tylor OVA as Dom (voice)
1994		I'm Not an Angel! as Bunta Kouno (voice)
1994		Love Wedge 2 as Riki (voice)
1994		Genocyber as Sakomizu (voice)
1994		Natsuki Crisis as Kyōtarō Himuro

1993		Please Save My Earth as Mikuro Yakushimaru (voice)
1993		Please Save My Earth as Mikuro Yakushimaru (voice)
1993		Black Jack as Tokio Umetani (voice)
1993		Aoki Densetsu Shoot! as Akihiko Himuro
1993		Ocean Waves as Yutaka Matsuno (voice)
1993		Suikoden Demon Century as Takateru Suga (voice)
1993		Kiss Me on the Apple of My Eye as Naoto (voice)
1993		Ninja Scroll as Yurimaru (voice)
1993		Ninja Boy Rantaro as Hansuke Doi
1993		The Irresponsible Captain Tylor as Ru Baraba Dom

1992		Download: Devil's Circuit as Sid (voice)
1992		D-1 Devastator as 谷田辺了
1992		Oruorane the Cat Player as The Cellist
1992		Ai no Kusabi as Riki (voice)
1992		Love Wedge 1 as Riki (voice)
1992		Yawara! Go Get 'Em, Wimpy Kids!!
1992		Princess Army: Wedding Combat as Yuuya Hashiba
1992		Calico Cat Holmes and the Lord of the Haunted Castle as Yoshitaro Katayama (voice)
1992		The Weathering Continent as Tieh (voice)

1991		Moonlight Pierce as Hiroshi Takama (voice)
1991		Nyūin Bokki Monogatari Ojiji ni!
1991		Inferious Interplanetary War Chronicle - Condition Green as Soo Laform (voice)
1991		Here Is Greenwood as Shinobu Tezuka (voice)
1991		Ranma ½: The Movie — The Battle of Nekonron: The Fight to Break the Rules! as Mousse (voice)
1991		Handsome Girl as Ichiya Kumagai (voice)
1991		Izumo as Izumo (voice)
1991		Legend of Heavenly Sphere Shurato: The Secret Feud of Creation as Shurato
1991		Detonator Orgun as Knock
1991		Yuukan Club
1991		Nadia: The Secret of Blue Water - Nautilus Story II as Fate (voice)
1991		Hisashi Eguchi's Kotobuki Goro Show as Piston Akagi (voice)
1991		Blazing Transfer Student as Noboru Takizawa (voice)
1991		Future GPX Cyber Formula as Jotaro Kaga

1990		Hakkenden: Legend of the Dog Warriors as Shino Inuzuka (voice)
1990		TOKYO CITY Melhen 2
1990		Marina the Manga Artist Goes to Camelot as Bijomaru Shizuka (voice)
1990		Midoriyama High School, Koshien Edition (Movie)
1990		Milky Passion: Dougenzaka - The Castle of Love as Ootsuki (voice)
1990		Goddamn as Hans Schultz
1990		Goddamn as Hans Schultz
1990		Nadia: The Secret of Blue Water as Fejto (voice)
1990		Heart-Coloured Killer Ticket as Chuta Misora (voice)
1990		Ryokunohara Labyrinth - Sparkling Phantom as Hiroki Imashi

1989		Demon Hunter Makaryūdo as Shou Kurogane (voice)
1989		Yawara! as Matsuda / Eiji (voice)
1989		Darkness of the Sea, Shadow of the Moon as Katsuyuki Touma (voice)
1989		Dash! Yonkuro
1989		Angel Cop as Tachihara (voice)
1989		Cinderella Express as Yuji Shimano
1989		Ranma ½ as Mousse (voice)
1989		Madö King Granzört as Grunwald
1989		Shurato as Shurato
1989		Hades Project: Zeorymer Extinction as Masato Akitsu / Masaki Kihara (voice)

1988		Kaze wo Nuke!
1988		Hades Project: Zeorymer Separation as Masato Akitsu (voice)
1988		Hades Project: Zeorymer Separation as Masaki Kihara (voice)
1988		Hades Project Zeorymer as 秋津マサト / 木原マサキ (voice)
1988		Armor Hunter Merowlink as PFC Cepres
1988		Dragon Century
1988		Dragon Century as Carmine (voice)
1988		Sunlight All Around! Ka - su - mi: You Were in My Dreams as Reporter B (voice)
1988		Zillion: Burning Night as J.J. (voice)
1988		Spirit Warrior as Kujaku (voice)
1988		Balthus: Tia's Radiance as Eud (voice)
1988		F

1987		The Samurai as Takeshi Chimatsuri
1987		TO-Y as Shouji (voice)
1987		Zillion as JJ
1987		Maryuu Senki
1987		Evil Dragon War Chronicles as 錦繍 (voice)
1987		Campus Special Investigator Hikaruon as Hikaru Shihodo (voice)

1986		Castle in the Sky as Additional Voices (voice)
1986		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)
1971		Kamen Rider as Momotaros (voice)

Sound

2009

Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship as Theme Song Performance

2008

Kamen Rider Den-O & Kiva: Climax Deka as Theme Song Performance

2002

Angelique: Twin Collection as Theme Song Performance