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Koji Seki

Acting

Koji Seki

Born
25 November 1982 (age 43)
Place of birth
Saitama, Japan
Credits
38 titles

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 KAISENTV Show

JUJUTSU KAISEN

20208.6

SPY x FAMILYTV Show

SPY x FAMILY

20228.5

Sword Art OnlineTV Show

Sword Art Online

20128.1

Haikyu!!TV Show

Haikyu!!

20148.6

Frieren: Beyond Journey's EndTV Show

Frieren: Beyond Journey's End

20238.8

Dan Da DanTV Show

Dan Da Dan

20248.5

The Quintessential QuintupletsTV Show

The Quintessential Quintuplets

20198.4

BLUE LOCKTV Show

BLUE LOCK

20228.3

Tower of GodTV Show

Tower of God

20208.1

Star Wars: VisionsTV Show

Star Wars: Visions

20217.1

I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, TooTV Show

I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too

20238.2

HAIKYU!! The Dumpster BattleMovie

HAIKYU!! The Dumpster Battle

20247.8

I've Been Killing Slimes for 300 Years and Maxed Out My LevelTV Show

I've Been Killing Slimes for 300 Years and Maxed Out My Level

20217.8

Sword Art Online the Movie – Progressive – Scherzo of Deep NightMovie

Sword Art Online the Movie – Progressive – Scherzo of Deep Night

20227.7

Daily Lives of High School BoysTV Show

Daily Lives of High School Boys

20128.0

NieR:Automata Ver1.1aTV Show

NieR:Automata Ver1.1a

20238.1

Yashahime: Princess Half-DemonTV Show

Yashahime: Princess Half-Demon

20208.3

March Comes In Like a LionTV Show

March Comes In Like a Lion

20168.0

You and I Are Polar OppositesTV Show

You and I Are Polar Opposites

20268.6

Orb: On the Movements of the EarthTV Show

Orb: On the Movements of the Earth

20248.1

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Filmography

  1. 2026

    • Star Wars: Visions Presents - The Ninth Jedias Satellite Digger (voice)TV Show7.3
    • Akane-banashias Chusuke Chuotei (voice)TV Show7.8
    • You and I Are Polar Oppositesas Convenience Store Manager (voice)TV Show8.6

  2. 2025

    • Inexpressive Kashiwada and Expressive Ootaas Mathematics Teacher (voice)TV Show7.2
    • Solo Camping for Twoas Izakaya Manager (voice)TV Show7.5
    • Turkey! Time to Strikeas Samurai (voice)TV Show6.3
    • Welcome to the Outcast's Restaurant!as Merchant (voice)TV Show7.4
    • Summer Pocketsas (voice)TV Show6.9
    • Catch Me at the Ballpark!as Kaiser (voice)TV Show7.8

  3. 2024

    • Puniru Is a Kawaii Slimeas Academic Researchers (voice)TV Show7.7
    • Orb: On the Movements of the Earthas Knight (voice)TV Show8.1
    • Dan Da Danas TV Station Producer (voice)TV Show8.5
    • Let This Grieving Soul Retireas Greg Zangief (voice)TV Show6.6
    • DAN DA DAN: First Encounteras TV Station Producer (voice)Movie7.5
    • Umamusume: Pretty Derby - Beginning of a New Eraas (voice)Movie8.5
    • Mission: Yozakura Familyas Detective (voice)TV Show7.5
    • HAIKYU!! The Dumpster Battleas Patient (voice)Movie7.8

  4. 2023

    • Tearmoon Empireas Priest (voice)TV Show7.1
    • Frieren: Beyond Journey's Endas Villager (voice)TV Show8.8
    • I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Tooas (voice)TV Show8.2
    • The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Faras Sebas (voice)TV Show7.1
    • NieR:Automata Ver1.1aas Kingdom Citizen (voice)TV Show8.1

  5. 2022

    • Sword Art Online the Movie – Progressive – Scherzo of Deep Nightas Naijan (voice)Movie7.7
    • BLUE LOCKas Reporter B (voice)TV Show8.3