Acting

Koji Seki

Born: 1982-11-25
Birthplace: Saitama, Japan

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

Filmography

38 titles · Newest first · Cast and crew credits

Akane-banashi

2026 · TV Show

Chusuke Chuotei (voice)

Star Wars: Visions Presents - The Ninth Jedi

2026 · TV Show

Satellite Digger (voice) · Eesha's Father (voice) · Villager on Samaz (voice)

You and I Are Polar Opposites

2026 · TV Show

Convenience Store Manager (voice)

Catch Me at the Ballpark!

2025 · TV Show

Kaiser (voice)

Inexpressive Kashiwada and Expressive Oota

2025 · TV Show

Mathematics Teacher (voice)

Solo Camping for Two

2025 · TV Show

Izakaya Manager (voice)

Summer Pockets

2025 · TV Show

(voice)

Turkey! Time to Strike

2025 · TV Show

Samurai (voice)

Welcome to the Outcast's Restaurant!

2025 · TV Show

Merchant (voice)

Dan Da Dan

2024 · TV Show

TV Station Producer (voice) · Male Client (voice) · Male Teacher (voice)

DAN DA DAN: First Encounter

2024 · Movie

TV Station Producer (voice)

HAIKYU!! The Dumpster Battle

2024 · Movie

Patient (voice)

Let This Grieving Soul Retire

2024 · TV Show

Greg Zangief (voice)

Mission: Yozakura Family

2024 · TV Show

Detective (voice) · (voice) · Battalion member (voice)

Orb: On the Movements of the Earth

2024 · TV Show

Knight (voice)

Puniru Is a Kawaii Slime

2024 · TV Show

Academic Researchers (voice) · Academic Researcher (voice)

Umamusume: Pretty Derby - Beginning of a New Era

2024 · Movie

(voice)

Frieren: Beyond Journey's End

2023 · TV Show

Villager (voice)

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

2023 · TV Show

(voice)

NieR:Automata Ver1.1a

2023 · TV Show

Kingdom Citizen (voice) · Machine Creature (voice)

Tearmoon Empire

2023 · TV Show

Priest (voice) · Man (voice) · Soldier (voice) · Merchant (voice)

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

2023 · TV Show

Sebas (voice)

BLUE LOCK

2022 · TV Show

Reporter B (voice)

SPY x FAMILY

2022 · TV Show

Rahden (voice)

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

2022 · Movie

Naijan (voice)

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

2021 · TV Show

Store Customer E (voice)

Remake Our Life!

2021 · TV Show

(voice)

Star Wars: Visions

2021 · TV Show

Eno's Father / Resistance Member (voice)

Super Cub

2021 · TV Show

Clerk (voice)

ID: INVADED

2020 · TV Show

Staff (voice)

JUJUTSU KAISEN

2020 · TV Show

Fumi's Father (voice)

Tower of God

2020 · TV Show

(voice)

Yashahime: Princess Half-Demon

2020 · TV Show

Thug (voice) · Old man (voice) · Peddler (voice) · Official (voice) · Guard (voice) · Chimimoryo (voice) · Villager (voice) · Bird of Paradise (voice) · Peasant (voice) · Subordinate (voice) · Townsfolk (voice) · Vassal (voice) · Fisherman (voice) · Demon (voice) · Palanquin Carrier (voice) · Rock Demon (voice) · Green ogre (voice) · Staff member (voice) · Yokai (voice) · Raccoon dog in Mamiana Island (voice)