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Koji Seki
Acting

Koji Seki

Born 1982-11-25
Saitama, Japan
Department: Acting

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

Prominent works featuring Koji Seki

JUJUTSU KAISEN
TV
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JUJUTSU KAISEN

2020
TMDB4.3
SPY x FAMILY
TV
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SPY x FAMILY

2022
TMDB4.3
Sword Art Online
TV
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Sword Art Online

2012
TMDB4.0
Haikyu!!
TV
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Haikyu!!

2014
TMDB4.3
Frieren: Beyond Journey's End
TV
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Frieren: Beyond Journey's End

2023
TMDB4.4
BLUE LOCK
TV
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BLUE LOCK

2022
TMDB4.2
Dan Da Dan
TV
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Dan Da Dan

2024
TMDB4.3
The Quintessential Quintuplets
TV
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The Quintessential Quintuplets

2019
TMDB4.2
Tower of God
TV
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Tower of God

2020
TMDB4.0
Star Wars: Visions
TV
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Star Wars: Visions

2021
TMDB3.5

Filmography & Credits

Complete career catalog (71 titles)

PosterTitleCharacter / RoleTypeYear
Star Wars: Visions Presents - The Ninth JediStar Wars: Visions Presents - The Ninth JediSatellite Digger (voice)TV Series2026
Star Wars: Visions Presents - The Ninth JediStar Wars: Visions Presents - The Ninth JediEesha's Father (voice)TV Series2026
Star Wars: Visions Presents - The Ninth JediStar Wars: Visions Presents - The Ninth JediVillager on Samaz (voice)TV Series2026
Akane-banashiAkane-banashiChusuke Chuotei (voice)TV Series2026
You and I Are Polar OppositesYou and I Are Polar OppositesConvenience Store Manager (voice)TV Series2026
Inexpressive Kashiwada and Expressive OotaInexpressive Kashiwada and Expressive OotaMathematics Teacher (voice)TV Series2025
Solo Camping for TwoSolo Camping for TwoIzakaya Manager (voice)TV Series2025
Turkey! Time to StrikeTurkey! Time to StrikeSamurai (voice)TV Series2025
Welcome to the Outcast's Restaurant!Welcome to the Outcast's Restaurant!Merchant (voice)TV Series2025
Summer PocketsSummer Pockets(voice)TV Series2025
Catch Me at the Ballpark!Catch Me at the Ballpark!Kaiser (voice)TV Series2025
Puniru Is a Kawaii SlimePuniru Is a Kawaii SlimeAcademic Researchers (voice)TV Series2024
Puniru Is a Kawaii SlimePuniru Is a Kawaii SlimeAcademic Researcher (voice)TV Series2024
Orb: On the Movements of the EarthOrb: On the Movements of the EarthKnight (voice)TV Series2024
Dan Da DanDan Da DanTV Station Producer (voice)TV Series2024
Dan Da DanDan Da DanMale Client (voice)TV Series2024
Dan Da DanDan Da DanMale Teacher (voice)TV Series2024
Let This Grieving Soul RetireLet This Grieving Soul RetireGreg Zangief (voice)TV Series2024
DAN DA DAN: First EncounterDAN DA DAN: First EncounterTV Station Producer (voice)Movie2024
Umamusume: Pretty Derby - Beginning of a New EraUmamusume: Pretty Derby - Beginning of a New Era(voice)Movie2024
Mission: Yozakura FamilyMission: Yozakura FamilyDetective (voice)TV Series2024
Mission: Yozakura FamilyMission: Yozakura Family(voice)TV Series2024
Mission: Yozakura FamilyMission: Yozakura FamilyBattalion member (voice)TV Series2024
HAIKYU!! The Dumpster BattleHAIKYU!! The Dumpster BattlePatient (voice)Movie2024
Tearmoon EmpireTearmoon EmpirePriest (voice)TV Series2023
Tearmoon EmpireTearmoon EmpireMan (voice)TV Series2023
Tearmoon EmpireTearmoon EmpireSoldier (voice)TV Series2023
Tearmoon EmpireTearmoon EmpireMerchant (voice)TV Series2023
Frieren: Beyond Journey's EndFrieren: Beyond Journey's EndVillager (voice)TV Series2023
I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, TooI Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too(voice)TV Series2023
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too FarThe Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too FarSebas (voice)TV Series2023
NieR:Automata Ver1.1aNieR:Automata Ver1.1aKingdom Citizen (voice)TV Series2023
NieR:Automata Ver1.1aNieR:Automata Ver1.1aMachine Creature (voice)TV Series2023
Sword Art Online the Movie – Progressive – Scherzo of Deep NightSword Art Online the Movie – Progressive – Scherzo of Deep NightNaijan (voice)Movie2022
BLUE LOCKBLUE LOCKReporter B (voice)TV Series2022
SPY x FAMILYSPY x FAMILYRahden (voice)TV Series2022
Star Wars: VisionsStar Wars: VisionsEno's Father / Resistance Member (voice)TV Series2021
Remake Our Life!Remake Our Life!(voice)TV Series2021
I've Been Killing Slimes for 300 Years and Maxed Out My LevelI've Been Killing Slimes for 300 Years and Maxed Out My LevelStore Customer E (voice)TV Series2021
Super CubSuper CubClerk (voice)TV Series2021
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonThug (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonOfficial (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonPeddler (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonGuard (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonOld man (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonChimimoryo (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonVillager (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonPeasant (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonBird of Paradise (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonSubordinate (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonTownsfolk (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonVassal (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonFisherman (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonDemon (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonRock Demon (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonPalanquin Carrier (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonGreen ogre (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonStaff member (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonYokai (voice)TV Series2020
Yashahime: Princess Half-DemonYashahime: Princess Half-DemonRaccoon dog in Mamiana Island (voice)TV Series2020
JUJUTSU KAISENJUJUTSU KAISENFumi's Father (voice)TV Series2020
Tower of GodTower of God(voice)TV Series2020
ID: INVADEDID: INVADEDStaff (voice)TV Series2020
The Quintessential QuintupletsThe Quintessential QuintupletsTeacher (voice)TV Series2019
The Quintessential QuintupletsThe Quintessential QuintupletsHomeroom Teacher (voice)TV Series2019
March Comes In Like a LionMarch Comes In Like a LionAuthorized Person 3 (voice)TV Series2016
Haikyu!!Haikyu!!Kai Akakura (voice)TV Series2014
Sword Art OnlineSword Art OnlineTechnical Staff (voice)TV Series2012
Sword Art OnlineSword Art OnlineGoblin (voice)TV Series2012
Daily Lives of High School BoysDaily Lives of High School BoysBasketball Guy (voice)TV Series2012
Daily Lives of High School BoysDaily Lives of High School BoysBoy B (voice)TV Series2012