Koji Seki
Acting·November 25, 1982 — 43 years old·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.
Known For
JUJUTSU KAISEN
2020·8.6
SPY x FAMILY
2022·8.5
Sword Art Online
2012·8.2
Haikyu!!
2014·8.6
Dan Da Dan
2024·8.5
Frieren: Beyond Journey's End
2023·8.8
The Quintessential Quintuplets
2019·8.4
BLUE LOCK
2022·8.3
Tower of God
2020·8.2
Star Wars: Visions
2021·7.1
I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
2023·8.2
HAIKYU!! The Dumpster Battle
2024·7.8
Filmography · 37
2026Akane-banashiTVChusuke Chuotei (voice)2026You and I Are Polar OppositesTVConvenience Store Manager (voice)2025Inexpressive Kashiwada and Expressive OotaTVMathematics Teacher (voice)2025Solo Camping for TwoTVIzakaya Manager (voice)2025Turkey! Time to StrikeTVSamurai (voice)2025Welcome to the Outcast's Restaurant!TVMerchant (voice)2025Summer PocketsTV(voice)2025Catch Me at the Ballpark!TVKaiser (voice)2024Puniru Is a Kawaii SlimeTVAcademic Researchers (voice) · Academic Researcher (voice)2024Orb: On the Movements of the EarthTVKnight (voice)2024Dan Da DanTVTV Station Producer (voice) · Male Client (voice) · Male Teacher (voice)2024Let This Grieving Soul RetireTVGreg Zangief (voice)2024DAN DA DAN: First EncounterTV Station Producer (voice)2024Umamusume: Pretty Derby - Beginning of a New Era(voice)2024Mission: Yozakura FamilyTVDetective (voice) · (voice) · Battalion member (voice)2024HAIKYU!! The Dumpster BattlePatient (voice)2023Tearmoon EmpireTVPriest (voice) · Man (voice) · Soldier (voice) · Merchant (voice)2023Frieren: Beyond Journey's EndTVVillager (voice)2023I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, TooTV(voice)2023The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too FarTVSebas (voice)2023NieR:Automata Ver1.1aTVKingdom Citizen (voice) · Machine Creature (voice)2022Sword Art Online the Movie – Progressive – Scherzo of Deep NightNaijan (voice)2022BLUE LOCKTVReporter B (voice)2022SPY x FAMILYTVRahden (voice)2021Star Wars: VisionsTVEno's Father / Resistance Member (voice)2021Remake Our Life!TV(voice)2021I've Been Killing Slimes for 300 Years and Maxed Out My LevelTVStore Customer E (voice)2021Super CubTVClerk (voice)2020Yashahime: Princess Half-DemonTVThug (voice) · Old man (voice) · Peddler (voice) · Official (voice) · Guard (voice) · Villager (voice) · Chimimoryo (voice) · Bird of Paradise (voice) · Peasant (voice) · Townsfolk (voice) · Subordinate (voice) · Vassal (voice) · Demon (voice) · Fisherman (voice) · Rock Demon (voice) · Palanquin Carrier (voice) · Green ogre (voice) · Staff member (voice) · Yokai (voice) · Raccoon dog in Mamiana Island (voice)2020JUJUTSU KAISENTVFumi's Father (voice)2020Tower of GodTV(voice)2020ID: INVADEDTVStaff (voice)2019The Quintessential QuintupletsTVTeacher (voice) · Homeroom Teacher (voice)2016March Comes In Like a LionTVAuthorized Person 3 (voice)2014Haikyu!!TVKai Akakura (voice)2012Sword Art OnlineTVTechnical Staff (voice) · Goblin (voice)2012Daily Lives of High School BoysTVBasketball Guy (voice) · Boy B (voice)