Actor
Koji Seki
November 25, 1982 · Saitama, Japan
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.
Notable work
8.6JUJUTSU KAISEN (2020)
as Fumi's Father (voice)
8.5SPY x FAMILY (2022)
as Rahden (voice)
8.2Sword Art Online (2012)
as Technical Staff (voice) and as Goblin (voice)
8.6Haikyu!! (2014)
as Kai Akakura (voice)
8.8Frieren: Beyond Journey's End (2023)
as Villager (voice)
8.5Dan Da Dan (2024)
as TV Station Producer (voice) and as Male Client (voice) and as Male Teacher (voice)
8.4The Quintessential Quintuplets (2019)
as Teacher (voice) and as Homeroom Teacher (voice)
8.3BLUE LOCK (2022)
as Reporter B (voice)
8.1Tower of God (2020)
as (voice)
7.1Star Wars: Visions (2021)
as Eno's Father / Resistance Member (voice)
8.2I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too (2023)
as (voice)
Often works with
Nobuhiko Okamoto
7 titles together
Haikyu!!, Frieren: Beyond Journey's End, Tower of God
Shinya Takahashi
6 titles together
SPY x FAMILY, Sword Art Online, I've Been Killing Slimes for 300 Years and Maxed Out My Level
Yoshitsugu Matsuoka
5 titles together
Sword Art Online, The Quintessential Quintuplets, BLUE LOCK
Yoshimasa Hosoya
5 titles together
Haikyu!!, HAIKYU!! The Dumpster Battle, Yashahime: Princess Half-Demon
Kenjiro Tsuda
4 titles together
JUJUTSU KAISEN, Tower of God, Orb: On the Movements of the Earth
Koki Uchiyama
4 titles together
JUJUTSU KAISEN, Haikyu!!, BLUE LOCK
Full filmography · 38
Star Wars: Visions Presents - The Ninth Jedi
as Satellite Digger (voice) and as Eesha's Father (voice) and as Villager on Samaz (voice)
20267.5
Akane-banashi
as Chusuke Chuotei (voice)
20268
You and I Are Polar Opposites
as Convenience Store Manager (voice)
20268.7
Inexpressive Kashiwada and Expressive Oota
as Mathematics Teacher (voice)
2025
Solo Camping for Two
as Izakaya Manager (voice)
20257.5
Turkey! Time to Strike
as Samurai (voice)
2025
Welcome to the Outcast's Restaurant!
as Merchant (voice)
20257.3
Summer Pockets
as (voice)
20256.9
Catch Me at the Ballpark!
as Kaiser (voice)
20257.8
Puniru Is a Kawaii Slime
as Academic Researchers (voice) and as Academic Researcher (voice)
20247.7
Orb: On the Movements of the Earth
as Knight (voice)
20248.1
Dan Da Dan
as TV Station Producer (voice) and as Male Client (voice) and as Male Teacher (voice)
20248.5