Koji Seki
Known for Acting · 37 credits
- Born
- 1982-11-25 (age 43)
- Place of birth
- Saitama, Japan
- Also known as
- Kouji Seki · 関 幸司 · Kōji Seki
Biography
Koji Seki (関 幸司, Seki Kōji, born November 25, 1982) is a Japanese voice actor from Saitama Prefecture who is affiliated with Raccoon Dog. He graduated from Pro-Fit Voice Actor Training School and joined the agency Pro-Fit. On April 1, 2022, he transferred to Raccoon Dog.
Known For
TV Shows (33)
JUJUTSU KAISEN
2020
as Fumi's Father (voice)
Frieren: Beyond Journey's End
2023
as Villager (voice)
SPY x FAMILY
2022
as Rahden (voice)
Haikyu!!
2014
as Kai Akakura (voice)
March Comes In Like a Lion
2016
as Authorized Person 3 (voice)
Sword Art Online
2012
as Technical Staff (voice) / Goblin (voice)
Dan Da Dan
2024
as TV Station Producer (voice) / Male Client (voice) / Male Teacher (voice)
Yashahime: Princess Half-Demon
2020
as Thug (voice) / Official (voice) / Peddler (voice) / Guard (voice) / Old man (voice) / Chimimoryo (voice) / Villager (voice) / Peasant (voice) / Bird of Paradise (voice) / Subordinate (voice) / Townsfolk (voice) / Vassal (voice) / Fisherman (voice) / Demon (voice) / Rock Demon (voice) / Palanquin Carrier (voice) / Green ogre (voice) / Staff member (voice) / Yokai (voice) / Raccoon dog in Mamiana Island (voice)
BLUE LOCK
2022
as Reporter B (voice)
Mission: Yozakura Family
2024
as Detective (voice) / Battalion member (voice)
Star Wars: Visions
2021
as Eno's Father / Resistance Member (voice)
Tower of God
2020
as (voice)
The Quintessential Quintuplets
2019
as Teacher (voice) / Homeroom Teacher (voice)
NieR:Automata Ver1.1a
2023
as Kingdom Citizen (voice) / Machine Creature (voice)
I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
2023
as (voice)
I've Been Killing Slimes for 300 Years and Maxed Out My Level
2021
as Store Customer E (voice)
Orb: On the Movements of the Earth
2024
as Knight (voice)
Summer Pockets
2025
as (voice)
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
2023
as Sebas (voice)
Super Cub
2021
as Clerk (voice)
You and I Are Polar Opposites
2026
as Convenience Store Manager (voice)
Puniru Is a Kawaii Slime
2024
as Academic Researchers (voice) / Academic Researcher (voice)
Daily Lives of High School Boys
2012
as Basketball Guy (voice) / Boy B (voice)
ID: INVADED
2020
as Staff (voice)
Let This Grieving Soul Retire
2024
as Greg Zangief (voice)
Catch Me at the Ballpark!
2025
as Kaiser (voice)
Tearmoon Empire
2023
as Priest (voice) / Man (voice) / Soldier (voice) / Merchant (voice)
Remake Our Life!
2021
as (voice)
Akane-banashi
2026
as Chusuke Chuotei (voice)
Solo Camping for Two
2025
as Izakaya Manager (voice)
Turkey! Time to Strike
2025
as Samurai (voice)
Welcome to the Outcast's Restaurant!
2025
as Merchant (voice)
Inexpressive Kashiwada and Expressive Oota
2025
as Mathematics Teacher (voice)
Movies (4)
About Koji Seki
Koji Seki (関 幸司, Seki Kōji, born November 25, 1982) is a Japanese voice actor from Saitama Prefecture who is affiliated with Raccoon Dog. He graduated from Pro-Fit Voice Actor Training School and joined the agency Pro-Fit. On April 1, 2022, he transferred to Raccoon Dog. With 37 credits spanning from 2012 to 2026, Koji Seki has appeared in 4 films and 33 TV shows.
Fans searching for Koji Seki movies, Koji Seki filmography, or the latest projects starring Koji Seki can stream many of these titles on CineFlixo, free and in HD, with no subscription required.
Most Popular Koji Seki Movies
- HAIKYU!! The Dumpster Battle (2024) — as Patient (voice)
- Umamusume: Pretty Derby - Beginning of a New Era (2024) — as (voice)
- Sword Art Online the Movie – Progressive – Scherzo of Deep Night (2022) — as Naijan (voice)
- DAN DA DAN: First Encounter (2024) — as TV Station Producer (voice)
Where to Watch Koji Seki Films
Most Koji Seki movies and series are available to stream on CineFlixo in full HD, completely free and without signup. Browse the complete filmography above to jump directly to any title. For more films and the latest web series featuring Koji Seki, check our movies catalogue and browse page.