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
Cast Credits
SANDA
Character: Hifumi Ōshibu (voice)
TV • 2025
Demon Slayer: Kimetsu no Yaiba Infinity Castle
Character: Muzan Kibutsuji (voice)
MOVIE • 2025
U Takes Terra
Character: Chongyue (Voice)
TV • 2025
Mashin Creator Wataru
Character: Mr. Liar (voice)
TV • 2025
I Have a Crush at Work
Character: Pastor (voice)
TV • 2025
Nintama Rantarō: Invincible Master of the Dokutake Ninja
Character: Hansuke Doi (voice)
MOVIE • 2024
I Parry Everything
Character: Carew (voice)
TV • 2024
The Birth of Kitaro: The Mystery of GeGeGe
Character: Kitarou's Father (voice)
MOVIE • 2023
Onimusha
Character: Kojiro Sasaki (voice)
TV • 2023
PLUTO
Character: Sahad (voice)
TV • 2023
PLUTO
Character: Pluto (voice)
TV • 2023
The Most Heretical Last Boss Queen: From Villainess to Savior
Character: Clark Darwin (voice)
TV • 2023
Rurouni Kenshin
Character: Narration (voice)
TV • 2023
Black Clover: Sword of the Wizard King
Character: Conrad Leto (voice)
MOVIE • 2023
HIGH CARD
Character: Norman Kingstat (voice)
TV • 2023
Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
Character: Muzan Kibutsuji (voice)
MOVIE • 2022
Avataro Sentai Donbrothers meets Kamen Rider Den-O: Aim for it! The Don-O
Character: Momotaros (voice)
TV • 2022
My Hero Academia: World Heroes' Mission
Character: Eddie Soul (voice)
MOVIE • 2021
Kamen Rider Saber + Kikai Sentai Zenkaiger: Super Hero Chronicles
Character: Momotaros (voice) / Kamen Rider Den-O (voice)
MOVIE • 2021
Higurashi: When They Cry - NEW
Character: Kyousuke Irie (voice)
TV • 2020
Crew
