Toshihiko Seki

Acting

Born June 11, 1962, 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.

Filmography

• 2026Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi — Cosmo Gavarion System Voice / Gavarion Trigger System Voice
• My Ribdiculous Reincarnation
• PROJECT R.E.D. — GavarionTrigger / CosmoGavarion (voice)
• 2026Super Space Sheriff Gavan Infinity: Jo-Chaku Course — Gavarion Trigger System Voice (voice)
• 2025Demon Slayer: Kimetsu no Yaiba Infinity Castle — Muzan Kibutsuji (voice)
• I Have a Crush at Work — Pastor (voice)
• Mashin Creator Wataru — Mr. Liar (voice)
• SANDA — Hifumi Ōshibu (voice)
• U Takes Terra — Chongyue (Voice)
• Good Bye, Dragon Life — Dio (voice)
• I Parry Everything — Carew (voice)
• Kaiju No. 8 — Kaiju No. 11 (voice)
• 2024Nintama Rantarō: Invincible Master of the Dokutake Ninja — Hansuke Doi (voice)
• Ranma1/2 — Mousse (voice)
• 2023Black Clover: Sword of the Wizard King — Conrad Leto (voice)
• HIGH CARD — Norman Kingstat (voice)
• Onimusha — Kojiro Sasaki (voice)
• PLUTO — Sahad (voice), Pluto (voice)
• Rurouni Kenshin — Narration (voice)
• 2023The Birth of Kitaro: The Mystery of GeGeGe — Kitarou's Father (voice)
• The Most Heretical Last Boss Queen: From Villainess to Savior — Clark Darwin (voice)
• Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O — Momotaros (voice)
• 2022Demon Slayer: Kimetsu no Yaiba - Asakusa Arc — Muzan Kibutsuji (voice)
• 2021Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles — Momotaros (voice) / Kamen Rider Den-O (voice)
• 2021My Hero Academia: World Heroes' Mission — Eddie Soul (voice)
• Higurashi: When They Cry - NEW — Kyousuke Irie (voice)
• 2020Kamen Rider Den-O: The Birth of Pretty Den-O! — Momotaros (voice)
• The Misfit of Demon King Academy — Ahide Alobo Agatze (voice)
• Ascendance of a Bookworm — Eustachius (voice)
• Demon Slayer: Kimetsu no Yaiba — Muzan Kibutsuji (voice)
• 2019Demon Slayer: Kimetsu no Yaiba - Sibling's Bond — Muzan Kibutsuji (voice)
• SAINT SEIYA: Knights of the Zodiac — Scorpio Milo (voice)
• Sarazanmai — Yuri Kamome
• Star☆Twinkle PreCure — Toto Hagoromo (voice)
• Golden Kamuy — Kazuo Henmi (voice)
• 2018Kamen Rider Heisei Generations Forever — Momotaros / Kamen Rider Den-O Sword Form (voice)
• SWORD GAI: The Animation — Miura Takuma
• Saint Seiya: Saintia Sho — Scorpio Milo (voice)
• The Ryuo's Work is Never Done! — Kiyotaki Kousuke (voice)
• 2017Kamen Rider × Super Sentai: Ultra Super Hero Wars — Momotaros - Kamen Rider Den-O Sword Form (voice)
• 2017Mazinger Z: Infinity — Tetsuya Tsurugi (voice)
• 2017Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- — Momotaros
• THE REFLECTION — Michael Holden (voice)
• The Laughing Salesman NEW — Shisao Kihara(Story2)
• Descending Stories — Eisuke Higuchi (voice)
• Mob Psycho 100 — Morizo Ebihara (voice), Musashi Goda (voice)
• 2016Naruto OVA 12: The Day Naruto Became Hokage — Iruka Umino (voice)
• To Be Hero — Chinese Tohoku Muffler (voice)
• 2015Mobile Suit Gundam: The Origin II - Artesia's Sorrow — Char Aznable (voice)
• Saint Seiya: Soul of Gold — Scorpio Milo (voice)
• Cross Ange: Rondo of Angels and Dragons — Embryo (voice)
• 2014Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai — Kamen Rider Den-O Sword Form (voice)
• Space Dandy — Public Prosecutor (voice)
• Gingitsune: Messenger Fox of the Gods — Tatsuo Saeki (voice)
• 2013Higurashi: When They Cry - Outbreak — Kyousuke Irie (voice)
• 2013Hunter x Hunter: The Last Mission — Wing (voice)
• Triple Combination: Transformers Go! — Gekisōmaru (voice)
• 声優戦隊ボイストーム7 — (voice)
• Glitter Force — Hiroshi Hoshizora
• 2012Kamen Rider × Super Sentai: Super Hero Wars — Momotaros - Kamen Rider Den-O Sword Form (voice)
• 2012Road to Ninja: Naruto the Movie — Iruka Umino (voice)
• 2011Detective Conan: Quarter of Silence — Shogo Hikawa (voice)
• Guilty Crown — Kurosu Ouma (voice)
• Hunter x Hunter — Wing (voice)
• Mobile Suit Gundam SEED HD Remaster — Rey Za Burrel (voice), Rau Le Creuset (voice)
• 2011Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! — Hansuke Doi (voice)
• 2011OOO, Den-O, All Riders: Let's Go Kamen Riders — Momotaros / Kamen Rider Den-O Sword Form (voice)
• 2011OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~ — Momotaros (voice)
• Saiyuki Gaiden — Konzen Dōji (voice)
• 2010Kamen Rider Decade: Final Stage — Momotaros / Kamen Rider Den-O (Sword Form)
• 2010Kamen Rider × Kamen Rider × Kamen Rider The Movie Cho-Den-O Trilogy Movie Released Memorial Special Stage: Imagin Super Climax Tour 2010
• Katanagatari — Umigame Maniwa (voice)
• Psychic Detective Yakumo — Isshin Saitō
• 2010Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral — Momotaros (voice)
• 2010Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle — Momotaros (voice)
• 2010Super Kamen Rider Den-O Trilogy - Episode Yellow: Treasure de End Pirates — Momotaros (voice)
• 200910th Anniversary Project: Masked Rider LIVE & SHOW — Kamen Rider Den-O Sword Form (voice)
• Cookin' Idol Ai! Mai! Main! — 柊修
• Dogs: Bullets & Carnage — Ernst Rammsteiner
• 2009Kamen Rider Decade: All Riders vs. Dai-Shocker — Momotaros / Kamen Rider Den-O (voice)
• 2009Kamen Rider Kiva & Den-O: DenLiner, Into Space! — Momotaros (voice)
• 2009Kamen Rider × Kamen Rider W & Decade: Movie War 2010 — Kamen Rider Den-O (voice)
• 2009Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- — Momotaros (voice)
• 2009Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship — Momotaros (voice), Theme Song Performance
• A Certain Magical Index — Aleister Crowley (voice)
• Blade of the Immortal — Souri (voice)
• 2008Farewell Kamen Rider Den-O: Final Countdown — Momotaros (voice)
• 2008Imagin Anime: Momotaros Forever!/Imajin Terminal Station — Momotaros (voice)
• 2008Kamen Rider Den-O & Kiva: Climax Deka — Momotaros (voice), Theme Song Performance
• 2008Kamen Rider Den-O: Final Trilogy Special Edition — Momotaros (voice)
• Kamen Rider Den-O: Imagin Anime — Momotaros (voice)
• 2008Kamen Rider Kiva: King of the Castle in the Demon World — Penetentiary Officer Sanjo
• 2008Momotaros' King of the Crimson Castle — Momotaros (voice)
• Momotaros' King of the Crimson Castle — Momotaros (voice)
• Sekirei — Hiroto Minaka
• 2007Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!! — Momotaros (voice)
• Kamen Rider Den-O — Momotaros (voice)
• 2007Kamen Rider Den-O The Movie: I'm Born! — Momotaros (voice)
• 2007Kamen Rider Den-O: Final Stage — Momotaros
• 2007Kamen Rider Den-O: Singing, Dancing, Great Training!! — Momotaros (voice)
• 2007Momotaros' Summer Vacation — Momotaros (voice)
• Naruto Shippūden — Iruka Umino (voice)
• Saiyuki Reload: Burial — Genjō Sanzō (voice)
• Higurashi: When They Cry — Kyousuke Irie (voice)
• Loving Angel Angelique — Luva
• Shonen Onmyouji
• My-Otome — Rad (voice)
• MÄR: Märchen Awakens Romance — Danna Toramizu
• Bleach — Aaroniero Arruruerie (voice)
• Gin'yuu Mokushiroku Meine Liebe — Ludwig Herzog von Mohn nahe Liechtenstein (voice)
• My-Hime — Reito Kanzaki (voice)
• Paranoia Agent — Mitsuhiro Maniwa (voice)
• 2004Paranoia Agent: Part 1 — まにわ みつひろ
• Samurai Champloo — Yamane (voice)
• Requiem from the Darkness — Momosuke Yamaoka (voice)
• Angelique: Twin Collection — Luva (voice), Theme Song Performance
• 2002Animation Store Manager — Ryuu Raiba (voice)
• Mirage of Blaze — Takaya Ohgi (voice)
• Mobile Suit Gundam SEED — Rau Le Creuset (voice), Rey Za Burrel (voice)
• Naruto — Iruka Umino (voice)
• Saint Seiya: The Hades Chapter — Milo (voice)
• 2002Saiyuki Interactive
• 2001Saiyuki: Requiem — Genjo Sanzo (voice)
• 2000Baby Felix & Friends — Felix The Cat
• Descendants of Darkness — Yutaka Watari (voice)
• 2000Reign: The Conqueror Movie — Alexander
• Saiyuki — Konzen Douji (voice), Genjo Sanzo (voice)
• Bビーダマン爆外伝V — Kurobon
• Harlock Saga - The Ring of the Nibelungs
• Pet Shop of Horrors — Count D (voice)
• Reign: The Conqueror — Alexander (voice)
• Bomberman B-Daman Bakugaiden
• 1998Gundam Wing: The Endless Waltz — Duo Maxwell (voice)
• Nightwalker: The Midnight Detective — Bait
• Outlaw Star — Fred (voice)
• TRIGUN — Legato Bluesummers (voice)
• 1997Chimera: Angel of Death — Ron (voice)
• Dragoon — Rain Keeves Fearudo (voice)
• Hakugei: Legend of the Moby Dick
• Hyper Police — Sakunoshin Chikura
• 1997Twilight of the Dark Master — Shijo Tsunami (voice)
• B'T X — Quatro (voice)
• Special Duty Combat Unit Shinesman — Shujin Seki (voice)
• 1996The End of the Century Darling — Todorokki Kouhei (voice)
• The Legend of Zorro — Don Diego de la Vega / Zorro
• 1996Ultraman Super Fighter Legend — Ultraseven / Ultraman Leo (voice)
• 1996Violinist of Hamelin: The Movie — Raiel (voice)
• 1996X — Shougo
• 1996Yawara! Atlanta Special
• 1995Bio Hunter — Komada
• Mobile Suit Gundam Wing — Duo Maxwell (voice)
• Udauda Yatteru Hima wa Nee! — (voice)
• 1994Dorami-chan: A Blue Straw Hat — Crow (voice)
• 1994Genocyber — Sakomizu (voice)
• 1994I'm Not an Angel! — Bunta Kouno (voice)
• 1994Love Wedge 2 — Riki (voice)
• Natsuki Crisis — Kyōtarō Himuro
• The Irresponsible Captain Tylor OVA — Dom (voice)
• 1994The Irresponsible Captain Tylor: Tylor's War — Ru Baraba Dom (voice)
• Wild 7 — Dairoku Hiba
• 1994Wild 7: Biker Knights — Dairoku Hiba
• Aoki Densetsu Shoot! — Akihiko Himuro (voice)
• Black Jack — Tokio Umetani (voice)
• 1993Kiss Me on the Apple of My Eye — Naoto (voice)
• Ninja Boy Rantaro — Hansuke Doi
• 1993Ninja Scroll — Yurimaru (voice)
• 1993Ocean Waves — Yutaka Matsuno (voice)
• Please Save My Earth — Mikuro Yakushimaru (voice)
• 1993Suikoden Demon Century — Takateru Suga (voice)
• The Irresponsible Captain Tylor — Ru Baraba Dom
• Ai no Kusabi — Riki (voice)
• Bastard!!
• 1992Calico Cat Holmes and the Lord of the Haunted Castle — Yoshitaro Katayama (voice)
• D-1 Devastator — 谷田辺了
• 1992Download: Devil's Circuit — Sid (voice)
• 1992Love Wedge 1 — Riki (voice)
• 1992Oruorane the Cat Player — The Cellist
• Princess Army: Wedding Combat — Yuuya Hashiba
• 1992Ranma 1/2 the Movie 2: Nihao My Concubine — Mousse (voice)
• 1992The Weathering Continent — Tieh (voice)
• 1992Yawara! Go Get 'Em, Wimpy Kids!! — (voice)
• Akai Hayate
• Blazing Transfer Student — Noboru Takizawa (voice)
• Detonator Orgun — Knock
• Flaming Rugby Boy: Dodge Danpei — Nikaidou
• Future GPX Cyber Formula — Jotaro Kaga
• 1991Handsome Girl — Ichiya Kumagai (voice)
• Here Is Greenwood — Shinobu Tezuka (voice)
• 1991Hisashi Eguchi's Kotobuki Goro Show — Piston Akagi (voice)
• 1991Inferious Interplanetary War Chronicle - Condition Green — Soo Laform (voice)
• Izumo — Izumo (voice)
• Legend of Heavenly Sphere Shurato: The Secret Feud of Creation — Shurato
• 1991Moonlight Pierce — Hiroshi Takama (voice)
• 1991Nadia: The Secret of Blue Water - Nautilus Story II — Fate (voice)
• 1991Nadia: The Secret of Blue Water - The Motion Picture — Falt (voice)
• Nyūin Bokki Monogatari Ojiji ni!
• 1991Ranma 1/2 the Movie: Big Trouble in Nekonron, China — Mousse (voice)
• 1991Trusty Ginjiro — Hideki Mitsui (voice)
• 1991Yuukan Club
• 1990Goddamn — Hans Schultz
• Goddamn — Hans Schultz
• 1990Heart-Coloured Killer Ticket — Chuta Misora (voice)
• 1990Marina the Manga Artist Goes to Camelot — Bijomaru Shizuka (voice)
• 1990Midoriyama High School, Koshien Edition (Movie)
• 1990Milky Passion: Dougenzaka - The Castle of Love — Ootsuki (voice)
• Nadia: The Secret of Blue Water — Fejto (voice)
• 1990Ryokunohara Labyrinth - Sparkling Phantom — Hiroki Imashi
• 1990TOKYO CITY Melhen 2
• The Hakkenden: Legend of the Dog Warriors — Shino Inuzuka (voice)
• 1989Angel Cop — Tachihara (voice)
• 1989Cinderella Express — Yuji Shimano
• Darkness of the Sea, Shadow of the Moon — Katsuyuki Touma (voice)
• Dash! Yonkuro
• 1989Demon Hunter Makaryūdo — Shou Kurogane (voice)
• 1989Hades Project: Zeorymer Extinction — Masato Akitsu / Masaki Kihara (voice)
• Madö King Granzört — Grunwald
• Nightsong of Splendor
• Ranma ½ — Mousse (voice)
• 1989Scarlet Demon
• Shurato — Shurato
• Star Cat Full House
• Yawara! — Matsuda / Eiji (voice)
• Armor Hunter Merowlink — PFC Cepres
• 1988Balthus: Tia's Radiance — Eud (voice)
• 1988Dragon Century — Carmine (voice)
• Dragon Century — Carmine
• F — Gunma Akagi (voice)
• Hades Project Zeorymer — (voice)
• 1988Hades Project: Zeorymer Separation — Masato Akitsu (voice), Masaki Kihara (voice)
• 1988Kaze wo Nuke!
• Spirit Warrior — Kujaku (voice)
• 1988Sunlight All Around! Ka - su - mi: You Were in My Dreams — Reporter B (voice)
• 1988Zillion: Burning Night — J.J. (voice)
• 1987Campus Special Investigator Hikaruon — Hikaru Shihodo / Hikaruon (voice)
• Evil Dragon War Chronicles — 錦繍 (voice)
• 1987Maryuu Senki
• 1987TO-Y — Shouji (voice)
• 1987The Samurai — Takeshi Chimatsuri
• Zillion — JJ
• 1986Call Me Tonight — Hayata (voice)
• 1986Castle in the Sky — Additional Voices (voice)
• Magical Emi, the Magic Star — Customer A (voice)
• Kamen Rider — Kamen Rider Den-O (voice), Momotaros (voice)