Actor
Toshihiko Seki
64 years · Sendai, Japon · 114 films
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.
Best known for
Castle in the Sky
1986 · (voice)
On HBO Max
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025 · Muzan Kibutsuji (voice)
On Hulu
Road to Ninja: Naruto the Movie
2012 · Iruka Umino (voice)
On YouTube Free
Ocean Waves
1993 · Yutaka Matsuno (voice)
On HBO Max
Ninja Scroll
1993 · Yurimaru (voice)
On HiDive
My Hero Academia: World Heroes' Mission
2021 · Eddie Soul (voice)
On Netflix
Filmography 114
Chō Uchū Keiji Gyaban Infiniti Taiyō ga Naita Hi
2026 · Cosmo Gavarion System Voice / Gavarion Trigger System Voice
Super Space Sheriff Gavan Infinity: Jo-Chaku Course
2026 · Gavarion Trigger System Voice (voice)
Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025 · Muzan Kibutsuji (voice)
On Hulu
Nintama Rantarō: Invincible Master of the Dokutake Ninja
2024 · Hansuke Doi (voice)
On Amazon Prime Video
The Birth of Kitaro: The Mystery of GeGeGe
2023 · Kitarou's Father (voice)
Black Clover: Sword of the Wizard King
2023 · Conrad Leto (voice)
On Netflix
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022 · Muzan Kibutsuji (voice)
My Hero Academia: World Heroes' Mission
2021 · Eddie Soul (voice)
On Netflix
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
2021 · Momotaros (voice) / Kamen Rider Den-O (voice)
Kamen Rider Den-O: The Birth of Pretty Den-O!
2020 · Momotaros (voice)
Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019 · Muzan Kibutsuji (voice)
Kamen Rider Heisei Generations Forever
2018 · Momotaros / Kamen Rider Den-O Sword Form (voice)
On Tubi TV
Mazinger Z: Infinity
2017 · Tetsuya Tsurugi (voice)
Saraba Kamen Rider Den-O: Special Event -Saraba Imagin! At Climax in the Entire Japan!!-
2017 · Momotaros
Kamen Rider × Super Sentai: Ultra Super Hero Wars
2017 · Momotaros - Kamen Rider Den-O Sword Form (voice)
Naruto OVA 12: The Day Naruto Became Hokage
2016 · Iruka Umino (voice)
Mobile Suit Gundam: The Origin II – Artesia's Sorrow
2015 · Char Aznable (voice)
Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai
2014 · Kamen Rider Den-O Sword Form (voice)
Hunter x Hunter: The Last Mission
2013 · Wing (voice)
Higurashi: When They Cry - Outbreak
2013 · Kyousuke Irie (voice)
Road to Ninja: Naruto the Movie
2012 · Iruka Umino (voice)
On YouTube Free
Kamen Rider × Super Sentai: Super Hero Wars
2012 · Momotaros - Kamen Rider Den-O Sword Form (voice)
Detective Conan: Quarter of Silence
2011 · Shogo Hikawa (voice)
OOO, Den-O, All Riders: Let's Go Kamen Riders
2011 · Momotaros / Kamen Rider Den-O Sword Form (voice)