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Koji Seki

Acting

Born November 25, 1982 · Saitama, Japan

Also known as Kouji Seki · 関 幸司 · Kōji 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.

Filmography37 titles

Frieren: Beyond Journey's End

2023as Villager (voice)

The Apothecary Diaries

2023as Audience (voice)

You and I Are Polar Opposites

2026as Convenience Store Manager (voice)

JUJUTSU KAISEN

2020as Fumi's Father (voice)

Haikyu!!

2014as Kai Akakura (voice)

Dan Da Dan

2024as TV Station Producer (voice)

SPY x FAMILY

2022as Rahden (voice)

The Quintessential Quintuplets

2019as Homeroom Teacher (voice)

BLUE LOCK

2022as Reporter B (voice)

Yashahime: Princess Half-Demon

2020as Palanquin Carrier (voice)

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

2023as (voice)

Orb: On the Movements of the Earth

2024as Knight (voice)

NieR:Automata Ver1.1a

2023as Kingdom Citizen (voice)

Tower of God

2020as (voice)

Sword Art Online

2012as Goblin (voice)

March Comes In Like a Lion

2016as Authorized Person 3 (voice)

Daily Lives of High School Boys

2012as Basketball Guy (voice)

Akane-banashi

2026as Chusuke Chuotei (voice)

Catch Me at the Ballpark!

2025as Kaiser (voice)

Haikyu!! The Dumpster Battle

2024as Patient (voice)

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

2021as Store Customer E (voice)

Puniru is a Kawaii Slime

2024as Academic Researchers (voice)

Sword Art Online the Movie: Progressive - Scherzo of Deep Night

2022as Naijan (voice)

Star Wars: Visions Presents - The Ninth Jedi

2026as Eesha's Father (voice)

Solo Camping for Two

2025as Izakaya Manager (voice)

Mission: Yozakura Family

2024as Detective (voice)

Welcome to the Outcast's Restaurant!

2025as Merchant (voice)

Super Cub

2021as Clerk (voice)

Remake Our Life!

2021as (voice)

Inexpressive Kashiwada and Expressive Oota

2025as Mathematics Teacher (voice)

Tearmoon Empire

2023as Priest (voice)

ID:Invaded

2020as Staff (voice)

The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far

2023as Sebas (voice)

Star Wars: Visions

2021as Eno's Father / Resistance Member (voice)

Summer Pockets

2025as (voice)

Let This Grieving Soul Retire!

2024as Greg Zangief (voice)

Turkey!

2025as Samurai (voice)