---
name: "Toshihiko Seki"
canonical: "https://film.one/person/toshihiko-seki"
roles: ["Actor"]
born: "11 June 1962"
reviewed_on_fi1m: 1
updated: "2026-09-16T21:20:01.758080+00:00"
licence: "© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL."
---

# Toshihiko Seki

Actor. Born 11 June 1962 in Sendai, Japon.

## Details

- **Work:** Actor
- **Born:** 11 June 1962, Sendai, Japon
- **Also known as:** せき としひこ, 关俊彦, 関 俊彦

## Biography

Toshihiko Seki is a Japanese voice actor, actor, singer and narrator. He was born on 11 June 1962 in Sendai, Miyagi Prefecture, and has been affiliated with the agency 81 Produce since 1983.

He is known for voicing Iruka Umino in the *Naruto* series (2002 onwards), Duo Maxwell in *Mobile Suit Gundam Wing* (1995), Momotaros in *Kamen Rider Den-O* (2007) and its spin-offs, and Muzan Kibutsuji in *Demon Slayer: Kimetsu no Yaiba* (2019) and the forthcoming *Demon Slayer: Kimetsu no Yaiba Infinity Castle* (2025). Other notable roles include characters in *Bleach* (2004), *Ranma ½* (1989) and *Hunter x Hunter* (2011).

Seki received the Kei Tomiyama Memorial Award at the 15th Seiyu Awards in 2021 and the Best Actors in a Leading Role award at the 19th Seiyu Awards in 2025.

*Sources: en.wikipedia.org, imdb.com, us.oricon-group.com.*

## On Fi1m (1)

- *Demon Slayer: Kimetsu no Yaiba Infinity Castle* (2025), Fi1m 74, as Muzan Kibutsuji (voice) — [page](https://film.one/film/demon-slayer-kimetsu-no-yaiba-infinity-castle.md)

## Also known for

- *Naruto Shippūden* (2007), Iruka Umino (voice)
- *Demon Slayer: Kimetsu no Yaiba* (2019), Muzan Kibutsuji (voice)
- *Naruto* (2002), Iruka Umino (voice)
- *Castle in the Sky* (1986), Additional Voices (voice)
- *Bleach* (2004), Aaroniero Arruruerie (voice)
- *Hunter x Hunter* (2011), Wing (voice)
- *Ranma ½* (1989), Mousse (voice)
- *Mob Psycho 100* (2016), Morizo Ebihara (voice), Musashi Goda (voice)

---
© Fi1m Ltd. Written by AI under a human editor; checked against sources before publication. Quote with attribution and a link to the canonical URL. Canonical: https://film.one/person/toshihiko-seki