Toshihiko Seki

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Acting

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

• Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi (2026)
• Super Space Sheriff Gavan Infinity: Jo-Chaku Course (2026)
• Demon Slayer: Kimetsu no Yaiba Infinity Castle (2025)
• Nintama Rantarō: Invincible Master of the Dokutake Ninja (2024)
• The Birth of Kitaro: The Mystery of GeGeGe (2023)
• Black Clover: Sword of the Wizard King (2023)
• Demon Slayer: Kimetsu no Yaiba - Asakusa Arc (2022)
• My Hero Academia: World Heroes' Mission (2021)
• Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles (2021)
• Kamen Rider Den-O: The Birth of Pretty Den-O! (2020)
• Demon Slayer: Kimetsu no Yaiba - Sibling's Bond (2019)
• Kamen Rider Heisei Generations Forever (2018)
• Mazinger Z: Infinity (2017)
• Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- (2017)
• Kamen Rider × Super Sentai: Ultra Super Hero Wars (2017)
• Naruto OVA 12: The Day Naruto Became Hokage (2016)
• Mobile Suit Gundam: The Origin II – Artesia's Sorrow (2015)
• Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014)
• Hunter x Hunter: The Last Mission (2013)
• Higurashi: When They Cry - Outbreak (2013)
• Road to Ninja: Naruto the Movie (2012)
• Kamen Rider × Super Sentai: Super Hero Wars (2012)
• Detective Conan: Quarter of Silence (2011)
• OOO, Den-O, All Riders: Let's Go Kamen Riders (2011)
• Nintama Rantaro the Movie: Ninjutsu Academy - All Hands on Deck! (2011)
• OOO, Den-O, All Riders: Let's Go Kamen Riders: ~Let's Look! Only Your 48 Riders~ (2011)
• 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 (2010)
• Super Kamen Rider Den-O Trilogy - Episode Blue: The Dispatched Imagin is Newtral (2010)
• Super Kamen Rider Den-O Trilogy - Episode Red: Zero's Star Twinkle (2010)
• Kamen Rider Decade: Final Stage (2010)
• Kamen Rider × Kamen Rider W & Decade: Movie War 2010 (2009)
• 10th Anniversary Project: Masked Rider LIVE & SHOW (2009)
• Kamen Rider Decade: All Riders vs. Dai-Shocker (2009)
• Super Kamen Rider Den-O & Decade NEO Generations: The Onigashima Warship (2009)
• Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!- (2009)
• Kamen Rider Kiva & Den-O: DenLiner, Into Space! (2009)
• Imagin Anime: Momotaros Forever!/Imajin Terminal Station (2008)
• Farewell Kamen Rider Den-O: Final Countdown (2008)
• Kamen Rider Kiva: King of the Castle in the Demon World (2008)
• Momotaros' King of the Crimson Castle (2008)
• Kamen Rider Den-O: Final Trilogy Special Edition (2008)
• Kamen Rider Den-O & Kiva: Climax Deka (2008)
• Kamen Rider Den-O: Final Stage (2007)
• Kamen Rider Den-O: Singing, Dancing, Great Training!! (2007)
• Kamen Rider Den-O The Movie: I'm Born! (2007)
• Crayon Shin-chan Midsummer Night: I Have Arrived! The Storm is Called Den-O vs. Shin-O! 60 Minute Special!! (2007)
• Momotaros' Summer Vacation (2007)
• Paranoia Agent: Part 1 (2004)
• Saiyuki Interactive (2002)
• Animation Store Manager (2002)
• Saiyuki: Requiem (2001)
• Reign: The Conqueror Movie (2000)
• Baby Felix & Friends (2000)
• Gundam Wing: The Endless Waltz (1998)
• Twilight of the Dark Master (1997)
• Ultraman Super Fighter Legend (1996)
• X (1996)
• Yawara! Atlanta Special (1996)
• Violinist of Hamelin: The Movie (1996)
• The End of the Century Darling (1996)
• Bio Hunter (1995)
• Wild 7: Biker Knights (1994)
• The Irresponsible Captain Tylor: Tylor's War (1994)
• I'm Not an Angel! (1994)
• Love Wedge 2 (1994)
• Dorami-chan: A Blue Straw Hat (1994)
• Genocyber (1994)
• Ocean Waves (1993)
• Suikoden Demon Century (1993)
• Kiss Me on the Apple of My Eye (1993)
• Ninja Scroll (1993)
• Download: Devil's Circuit (1992)
• Oruorane the Cat Player (1992)
• Love Wedge 1 (1992)
• Ranma 1/2 the Movie 2: Nihao My Concubine (1992)
• Yawara! Go Get 'Em, Wimpy Kids!! (1992)
• Calico Cat Holmes and the Lord of the Haunted Castle (1992)
• The Weathering Continent (1992)
• Moonlight Pierce (1991)
• Inferious Interplanetary War Chronicle - Condition Green (1991)
• Ranma 1/2 the Movie: Big Trouble in Nekonron, China (1991)
• Handsome Girl (1991)
• Yuukan Club (1991)
• Nadia: The Secret of Blue Water - The Motion Picture (1991)
• Nadia: The Secret of Blue Water - Nautilus Story II (1991)
• Trusty Ginjiro (1991)
• Hisashi Eguchi's Kotobuki Goro Show (1991)
• TOKYO CITY Melhen 2 (1990)
• Marina the Manga Artist Goes to Camelot (1990)
• Midoriyama High School, Koshien Edition (Movie) (1990)
• Milky Passion: Dougenzaka - The Castle of Love (1990)
• Goddamn (1990)
• Heart-Coloured Killer Ticket (1990)
• Ryokunohara Labyrinth - Sparkling Phantom (1990)
• Demon Hunter Makaryūdo (1989)
• Angel Cop (1989)
• Cinderella Express (1989)
• Scarlet Demon (1989)
• Hades Project: Zeorymer Extinction (1989)
• Kaze wo Nuke! (1988)
• Hades Project: Zeorymer Separation (1988)
• Dragon Century (1988)
• Sunlight All Around! Ka - su - mi: You Were in My Dreams (1988)
• Zillion: Burning Night (1988)
• Balthus: Tia's Radiance (1988)
• The Samurai (1987)
• TO-Y (1987)
• Maryuu Senki (1987)
• Campus Special Investigator Hikaruon (1987)
• Castle in the Sky (1986)
• Call Me Tonight (1986)