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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.
8.8Demon Slayer: Kimetsu no Yaiba Infinity Castle
2025
8.0Castle in the Sky
1986
8.1Black Clover: Sword of the Wizard King
2023
7.1Detective Conan: Quarter of Silence
2011
7.4Road to Ninja: Naruto the Movie
2012
7.6My Hero Academia: World Heroes' Mission
2021
6.4Ocean Waves
1993
7.8Ninja Scroll
1993
7.0Hunter x Hunter: The Last Mission
2013
7.9Demon Slayer: Kimetsu no Yaiba - Sibling's Bond
2019
7.0Mazinger Z: Infinity
2017
7.9Ranma 1/2 the Movie 2: Nihao My Concubine
1992
6.5Kamen Rider Decade: All Riders vs. Dai-Shocker
2009
7.4Naruto OVA 12: The Day Naruto Became Hokage
2016
7.3Ranma 1/2 the Movie: Big Trouble in Nekonron, China
1991
6.2X
1996
6.2Kamen Rider Heisei Generations Forever
2018
7.3Gundam Wing: The Endless Waltz
1998
7.6Demon Slayer: Kimetsu no Yaiba - Asakusa Arc
2022
6.2Kamen Rider × Kamen Rider W & Decade: Movie War 2010
2009