Acting · Saitama, Japan · Born November 25, 1982
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.
TVAkane-banashi
2026
as Chusuke Chuotei (voice)
TVYou and I Are Polar Opposites
2026
as Convenience Store Manager (voice)
TVInexpressive Kashiwada and Expressive Oota
2025
as Mathematics Teacher (voice)
TVSolo Camping for Two
2025
as Izakaya Manager (voice)
TVTurkey! Time to Strike
2025
as Samurai (voice)
TVWelcome to the Outcast's Restaurant!
2025
as Merchant (voice)
TVSummer Pockets
2025
as (voice)
TVCatch Me at the Ballpark!
2025
as Kaiser (voice)
TVPuniru Is a Kawaii Slime
2024
as Academic Researchers (voice)
TVOrb: On the Movements of the Earth
2024
as Knight (voice)
TVDan Da Dan
2024
as TV Station Producer (voice)
TVLet This Grieving Soul Retire
2024
as Greg Zangief (voice)
MovieDAN DA DAN: First Encounter
2024
as TV Station Producer (voice)
MovieUmamusume: Pretty Derby - Beginning of a New Era
2024
as (voice)
TVMission: Yozakura Family
2024
as Detective (voice)
MovieHAIKYU!! The Dumpster Battle
2024
as Patient (voice)
TVTearmoon Empire
2023
as Priest (voice)
TVFrieren: Beyond Journey's End
2023
as Villager (voice)
TVI Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
2023
as (voice)
TVThe Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
2023
as Sebas (voice)
TVNieR:Automata Ver1.1a
2023
as Kingdom Citizen (voice)
MovieSword Art Online the Movie – Progressive – Scherzo of Deep Night
2022
as Naijan (voice)
TVBLUE LOCK
2022
as Reporter B (voice)
TVSPY x FAMILY
2022
as Rahden (voice)
TVStar Wars: Visions
2021
as Eno's Father / Resistance Member (voice)
TVRemake Our Life!
2021
as (voice)
TVI've Been Killing Slimes for 300 Years and Maxed Out My Level
2021
as Store Customer E (voice)
TVSuper Cub
2021
as Clerk (voice)
TVYashahime: Princess Half-Demon
2020
as Thug (voice)
TVJUJUTSU KAISEN
2020
as Fumi's Father (voice)
TVTower of God
2020
as (voice)
TVID: INVADED
2020
as Staff (voice)
TVThe Quintessential Quintuplets
2019
as Teacher (voice)
TVMarch Comes In Like a Lion
2016
as Authorized Person 3 (voice)
TVHaikyu!!
2014
as Kai Akakura (voice)
TVSword Art Online
2012
as Technical Staff (voice)
TVDaily Lives of High School Boys
2012
as Basketball Guy (voice)
