
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.

Kamen Rider
TV • 1971

Kamen Rider
TV • 1971

Bleach
TV • 2004

Demon Slayer: Kimetsu no Yaiba Infinity Castle
MOVIE • 2025

Hunter x Hunter
TV • 2011

Ranma ½
TV • 1989

Ninja Boy Rantaro
TV • 1993

Naruto
TV • 2002

Mob Psycho 100
TV • 2016

Mob Psycho 100
TV • 2016

Naruto Shippūden
TV • 2007

Rurouni Kenshin
TV • 2023

Kaiju No. 8
TV • 2024

Mobile Suit Gundam SEED
TV • 2002

Mobile Suit Gundam SEED
TV • 2002

Ranma1/2
TV • 2024

Golden Kamuy
TV • 2018

MÄR: Märchen Awakens Romance
TV • 2005