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Koji Seki

Personal Info

Known For

Acting

Born

November 25, 1982 (age 43)

Place of Birth

Saitama, Japan

Also Known As

Kouji Seki

関幸司

Kōji Seki

Koji 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

JUJUTSU KAISEN

JUJUTSU KAISEN

Fumi's Father (voice)

2020

Frieren: Beyond Journey's End

Frieren: Beyond Journey's End

Villager (voice)

2023

SPY x FAMILY

SPY x FAMILY

Rahden (voice)

2022

Haikyu!!

Haikyu!!

Kai Akakura (voice)

2014

Sword Art Online

Sword Art Online

Technical Staff (voice)

2012

Sword Art Online

Sword Art Online

Goblin (voice)

2012

BLUE LOCK

BLUE LOCK

Reporter B (voice)

2022

Star Wars: Visions

Star Wars: Visions

Eno's Father / Resistance Member (voice)

2021

March Comes In Like a Lion

March Comes In Like a Lion

Authorized Person 3 (voice)

2016

Dan Da Dan

Dan Da Dan

TV Station Producer (voice)

2024

Dan Da Dan

Dan Da Dan

Male Client (voice)

2024

Dan Da Dan

Dan Da Dan

Male Teacher (voice)

2024

Summer Pockets

Summer Pockets

(voice)

2025

Tower of God

Tower of God

(voice)

2020

NieR:Automata Ver1.1a

NieR:Automata Ver1.1a

Kingdom Citizen (voice)

2023

NieR:Automata Ver1.1a

NieR:Automata Ver1.1a

Machine Creature (voice)

2023

Yashahime: Princess Half-Demon

Yashahime: Princess Half-Demon

Thug (voice)

2020

Yashahime: Princess Half-Demon

Yashahime: Princess Half-Demon

Old man (voice)

2020

Yashahime: Princess Half-Demon

Yashahime: Princess Half-Demon

Peddler (voice)

2020

Yashahime: Princess Half-Demon

Yashahime: Princess Half-Demon

Official (voice)

2020

Filmography

2025TVInexpressive Kashiwada and Expressive Ootaas Mathematics Teacher (voice)2025TVSolo Camping for Twoas Izakaya Manager (voice)2025TVTurkey! Time to Strikeas Samurai (voice)2025TVWelcome to the Outcast's Restaurant!as Merchant (voice)2025TVSummer Pocketsas (voice)2025TVCatch Me at the Ballpark!as Kaiser (voice)2024TVPuniru Is a Kawaii Slimeas Academic Researchers (voice)2024TVOrb: On the Movements of the Earthas Knight (voice)2024TVDan Da Danas TV Station Producer (voice)2024TVLet This Grieving Soul Retireas Greg Zangief (voice)2024FilmDAN DA DAN: First Encounteras TV Station Producer (voice)2024FilmUmamusume: Pretty Derby - Beginning of a New Eraas (voice)2024TVMission: Yozakura Familyas Detective (voice)2024FilmHAIKYU!! The Dumpster Battleas Patient (voice)2023TVTearmoon Empireas Priest (voice)2023TVFrieren: Beyond Journey's Endas Villager (voice)2023TVI Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Tooas (voice)2023TVThe Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Faras Sebas (voice)2023TVNieR:Automata Ver1.1aas Kingdom Citizen (voice)2022FilmSword Art Online the Movie – Progressive – Scherzo of Deep Nightas Naijan (voice)2022TVBLUE LOCKas Reporter B (voice)2022TVSPY x FAMILYas Rahden (voice)2021TVStar Wars: Visionsas Eno's Father / Resistance Member (voice)2021TVRemake Our Life!as (voice)2021TVI've Been Killing Slimes for 300 Years and Maxed Out My Levelas Store Customer E (voice)2021TVSuper Cubas Clerk (voice)2020TVYashahime: Princess Half-Demonas Thug (voice)2020TVJUJUTSU KAISENas Fumi's Father (voice)2020TVTower of Godas (voice)2020TVID: INVADEDas Staff (voice)2019TVThe Quintessential Quintupletsas Teacher (voice)2016TVMarch Comes In Like a Lionas Authorized Person 3 (voice)2014TVHaikyu!!as Kai Akakura (voice)2012TVSword Art Onlineas Technical Staff (voice)2012TVDaily Lives of High School Boysas Basketball Guy (voice)