Streamline
Koji Seki
Known for
Acting
Born
1982-11-25 · 43 years old
Place of birth
Saitama, Japan

Koji Seki

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 · 37 titles

JUJUTSU KAISEN
8.6

JUJUTSU KAISEN

2020

Frieren: Beyond Journey's End
8.8

Frieren: Beyond Journey's End

2023

Akane-banashi
8.1

Akane-banashi

2026

SPY x FAMILY
8.5

SPY x FAMILY

2022

Dan Da Dan
8.5

Dan Da Dan

2024

Summer Pockets
6.8

Summer Pockets

2025

Haikyu!!
8.6

Haikyu!!

2014

You and I Are Polar Opposites
8.4

You and I Are Polar Opposites

2026

BLUE LOCK
8.3

BLUE LOCK

2022

Sword Art Online
8.2

Sword Art Online

2012

Star Wars: Visions
7.1

Star Wars: Visions

2021

March Comes In Like a Lion
8.0

March Comes In Like a Lion

2016

Mission: Yozakura Family
7.5

Mission: Yozakura Family

2024

Yashahime: Princess Half-Demon
8.3

Yashahime: Princess Half-Demon

2020

The Quintessential Quintuplets
8.4

The Quintessential Quintuplets

2019

Puniru Is a Kawaii Slime
7.7

Puniru Is a Kawaii Slime

2024

NieR:Automata Ver1.1a
8.1

NieR:Automata Ver1.1a

2023

Tower of God
8.2

Tower of God

2020

I've Been Killing Slimes for 300 Years and Maxed Out My Level
7.9

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

2021

I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
8.2

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

2023

Orb: On the Movements of the Earth
8.0

Orb: On the Movements of the Earth

2024

Solo Camping for Two
7.3

Solo Camping for Two

2025

ID: INVADED
7.3

ID: INVADED

2020

Catch Me at the Ballpark!
7.8

Catch Me at the Ballpark!

2025

Let This Grieving Soul Retire
6.6

Let This Grieving Soul Retire

2024

Daily Lives of High School Boys
8.0

Daily Lives of High School Boys

2012

The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
7.1

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

2023

Inexpressive Kashiwada and Expressive Oota
7.0

Inexpressive Kashiwada and Expressive Oota

2025

Welcome to the Outcast's Restaurant!
7.3

Welcome to the Outcast's Restaurant!

2025

Remake Our Life!
7.2

Remake Our Life!

2021

HAIKYU!! The Dumpster Battle
7.8

HAIKYU!! The Dumpster Battle

2024

Tearmoon Empire
7.1

Tearmoon Empire

2023

Super Cub
7.3

Super Cub

2021

Turkey! Time to Strike
6.3

Turkey! Time to Strike

2025

Sword Art Online the Movie – Progressive – Scherzo of Deep Night
7.7

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

2022

Umamusume: Pretty Derby - Beginning of a New Era
8.6

Umamusume: Pretty Derby - Beginning of a New Era

2024

DAN DA DAN: First Encounter
7.6

DAN DA DAN: First Encounter

2024