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Recent Release
Star Wars: Visions Presents - The Ninth Jedi
Aug 5, 2026 TV Series
Koji Seki

Koji Seki

Acting
Born Nov 25, 1982 (43 years old)
Place of Birth Saitama, Japan
Gender Male
Popularity 1.1
IMDb View on IMDb
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.
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.

Credits

HAIKYU!! The Dumpster Battle
HAIKYU!! The Dumpster Battle
2024 7.8
Patient (voice)
HAIKYU!! The Dumpster Battle
Feb 16, 2024
Patient (voice)
7.8/10
 Sword Art Online the Movie – Progressive – Scherzo of Deep Night
Sword Art Online the Movie – Progressive – Scherzo of Deep Night
2022 7.7
Naijan (voice)
Sword Art Online the Movie – Progressive – Scherzo of Deep Night
Oct 22, 2022
Naijan (voice)
7.7/10
 DAN DA DAN: First Encounter
DAN DA DAN: First Encounter
2024 7.5
TV Station Producer (voice)
DAN DA DAN: First Encounter
Aug 31, 2024
TV Station Producer (voice)
7.5/10
 Umamusume: Pretty Derby - Beginning of a New Era
Umamusume: Pretty Derby - Beginning of a New Era
2024 8.5
(voice)
Umamusume: Pretty Derby - Beginning of a New Era
May 24, 2024
(voice)
8.5/10
JUJUTSU KAISEN
JUJUTSU KAISEN
2020 1 eps 8.6
Fumi's Father (voice)
JUJUTSU KAISEN
Oct 3, 2020
Fumi's Father (voice)
1 episodes
 Frieren: Beyond Journey's End
Frieren: Beyond Journey's End
2023 1 eps 8.8
Villager (voice)
Frieren: Beyond Journey's End
Sep 29, 2023
Villager (voice)
1 episodes
 SPY x FAMILY
SPY x FAMILY
2022 1 eps 8.5
Rahden (voice)
SPY x FAMILY
Apr 9, 2022
Rahden (voice)
1 episodes
 Haikyu!!
Haikyu!!
2014 4 eps 8.6
Kai Akakura (voice)
Haikyu!!
Apr 6, 2014
Kai Akakura (voice)
4 episodes
 Sword Art Online
Sword Art Online
2012 1 eps 8.1
Technical Staff (voice)
Sword Art Online
Jul 8, 2012
Technical Staff (voice)
1 episodes
 Sword Art Online
Sword Art Online
2012 1 eps 8.1
Goblin (voice)
Sword Art Online
Jul 8, 2012
Goblin (voice)
1 episodes
 March Comes In Like a Lion
March Comes In Like a Lion
2016 1 eps 8
Authorized Person 3 (voice)
March Comes In Like a Lion
Oct 8, 2016
Authorized Person 3 (voice)
1 episodes
 Star Wars: Visions
Star Wars: Visions
2021 1 eps 7.1
Eno's Father / Resistance Member (voice)
Star Wars: Visions
Sep 22, 2021
Eno's Father / Resistance Member (voice)
1 episodes
 Dan Da Dan
Dan Da Dan
2024 1 eps 8.5
TV Station Producer (voice)
Dan Da Dan
Oct 4, 2024
TV Station Producer (voice)
1 episodes
 Dan Da Dan
Dan Da Dan
2024 1 eps 8.5
Male Client (voice)
Dan Da Dan
Oct 4, 2024
Male Client (voice)
1 episodes
 Dan Da Dan
Dan Da Dan
2024 1 eps 8.5
Male Teacher (voice)
Dan Da Dan
Oct 4, 2024
Male Teacher (voice)
1 episodes
 Tower of God
Tower of God
2020 1 eps 8.1
(voice)
Tower of God
Apr 2, 2020
(voice)
1 episodes
 Mission: Yozakura Family
Mission: Yozakura Family
2024 1 eps 7.5
Detective (voice)
Mission: Yozakura Family
Apr 7, 2024
Detective (voice)
1 episodes
 Mission: Yozakura Family
Mission: Yozakura Family
2024 1 eps 7.5
(voice)
Mission: Yozakura Family
Apr 7, 2024
(voice)
1 episodes
 Mission: Yozakura Family
Mission: Yozakura Family
2024 1 eps 7.5
Battalion member (voice)
Mission: Yozakura Family
Apr 7, 2024
Battalion member (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Thug (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Thug (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Old man (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Old man (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Peddler (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Peddler (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Official (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Official (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Guard (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Guard (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 4 eps 8.3
Villager (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Villager (voice)
4 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Chimimoryo (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Chimimoryo (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Bird of Paradise (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Bird of Paradise (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Peasant (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Peasant (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 2 eps 8.3
Townsfolk (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Townsfolk (voice)
2 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Subordinate (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Subordinate (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 3 eps 8.3
Vassal (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Vassal (voice)
3 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Demon (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Demon (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Fisherman (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Fisherman (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Rock Demon (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Rock Demon (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Palanquin Carrier (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Palanquin Carrier (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Green ogre (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Green ogre (voice)
1 episodes
 BLUE LOCK
BLUE LOCK
2022 1 eps 8.3
Reporter B (voice)
BLUE LOCK
Oct 9, 2022
Reporter B (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Staff member (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Staff member (voice)
1 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 2 eps 8.3
Yokai (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Yokai (voice)
2 episodes
 Yashahime: Princess Half-Demon
Yashahime: Princess Half-Demon
2020 1 eps 8.3
Raccoon dog in Mamiana Island (voice)
Yashahime: Princess Half-Demon
Oct 3, 2020
Raccoon dog in Mamiana Island (voice)
1 episodes
 You and I Are Polar Opposites
You and I Are Polar Opposites
2026 2 eps 8.6
Convenience Store Manager (voice)
You and I Are Polar Opposites
Jan 11, 2026
Convenience Store Manager (voice)
2 episodes
 NieR:Automata Ver1.1a
NieR:Automata Ver1.1a
2023 1 eps 8.1
Kingdom Citizen (voice)
NieR:Automata Ver1.1a
Jan 8, 2023
Kingdom Citizen (voice)
1 episodes
 NieR:Automata Ver1.1a
NieR:Automata Ver1.1a
2023 1 eps 8.1
Machine Creature (voice)
NieR:Automata Ver1.1a
Jan 8, 2023
Machine Creature (voice)
1 episodes
 Puniru Is a Kawaii Slime
Puniru Is a Kawaii Slime
2024 2 eps 7.7
Academic Researchers (voice)
Puniru Is a Kawaii Slime
Oct 6, 2024
Academic Researchers (voice)
2 episodes
 Puniru Is a Kawaii Slime
Puniru Is a Kawaii Slime
2024 1 eps 7.7
Academic Researcher (voice)
Puniru Is a Kawaii Slime
Oct 6, 2024
Academic Researcher (voice)
1 episodes
 The Quintessential Quintuplets
The Quintessential Quintuplets
2019 1 eps 8.4
Teacher (voice)
The Quintessential Quintuplets
Jan 11, 2019
Teacher (voice)
1 episodes
 The Quintessential Quintuplets
The Quintessential Quintuplets
2019 2 eps 8.4
Homeroom Teacher (voice)
The Quintessential Quintuplets
Jan 11, 2019
Homeroom Teacher (voice)
2 episodes
 Orb: On the Movements of the Earth
Orb: On the Movements of the Earth
2024 1 eps 8.1
Knight (voice)
Orb: On the Movements of the Earth
Oct 5, 2024
Knight (voice)
1 episodes
 Let This Grieving Soul Retire
Let This Grieving Soul Retire
2024 24 eps 6.6
Greg Zangief (voice)
Let This Grieving Soul Retire
Oct 1, 2024
Greg Zangief (voice)
24 episodes
 Summer Pockets
Summer Pockets
2025 3 eps 6.9
(voice)
Summer Pockets
Apr 7, 2025
(voice)
3 episodes
 Catch Me at the Ballpark!
Catch Me at the Ballpark!
2025 1 eps 7.8
Kaiser (voice)
Catch Me at the Ballpark!
Apr 2, 2025
Kaiser (voice)
1 episodes
 Akane-banashi
Akane-banashi
2026 1 eps 7.8
Chusuke Chuotei (voice)
Akane-banashi
Apr 4, 2026
Chusuke Chuotei (voice)
1 episodes
 I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
2023 7 eps 8.2
(voice)
I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too
Apr 7, 2023
(voice)
7 episodes
 Star Wars: Visions Presents - The Ninth Jedi
Star Wars: Visions Presents - The Ninth Jedi
2026 2 eps 7.3
Satellite Digger (voice)
Star Wars: Visions Presents - The Ninth Jedi
Aug 5, 2026
Satellite Digger (voice)
2 episodes
 Star Wars: Visions Presents - The Ninth Jedi
Star Wars: Visions Presents - The Ninth Jedi
2026 1 eps 7.3
Eesha's Father (voice)
Star Wars: Visions Presents - The Ninth Jedi
Aug 5, 2026
Eesha's Father (voice)
1 episodes
 Star Wars: Visions Presents - The Ninth Jedi
Star Wars: Visions Presents - The Ninth Jedi
2026 1 eps 7.3
Villager on Samaz (voice)
Star Wars: Visions Presents - The Ninth Jedi
Aug 5, 2026
Villager on Samaz (voice)
1 episodes
 I've Been Killing Slimes for 300 Years and Maxed Out My Level
I've Been Killing Slimes for 300 Years and Maxed Out My Level
2021 1 eps 7.8
Store Customer E (voice)
I've Been Killing Slimes for 300 Years and Maxed Out My Level
Apr 10, 2021
Store Customer E (voice)
1 episodes
 Solo Camping for Two
Solo Camping for Two
2025 1 eps 7.5
Izakaya Manager (voice)
Solo Camping for Two
Jul 11, 2025
Izakaya Manager (voice)
1 episodes
 Welcome to the Outcast's Restaurant!
Welcome to the Outcast's Restaurant!
2025 1 eps 7.4
Merchant (voice)
Welcome to the Outcast's Restaurant!
Jul 3, 2025
Merchant (voice)
1 episodes
 Super Cub
Super Cub
2021 2 eps 7.3
Clerk (voice)
Super Cub
Apr 7, 2021
Clerk (voice)
2 episodes
 Daily Lives of High School Boys
Daily Lives of High School Boys
2012 1 eps 8
Basketball Guy (voice)
Daily Lives of High School Boys
Jan 10, 2012
Basketball Guy (voice)
1 episodes
 Daily Lives of High School Boys
Daily Lives of High School Boys
2012 1 eps 8
Boy B (voice)
Daily Lives of High School Boys
Jan 10, 2012
Boy B (voice)
1 episodes
 Tearmoon Empire
Tearmoon Empire
2023 2 eps 7.1
Priest (voice)
Tearmoon Empire
Oct 8, 2023
Priest (voice)
2 episodes
 Tearmoon Empire
Tearmoon Empire
2023 1 eps 7.1
Man (voice)
Tearmoon Empire
Oct 8, 2023
Man (voice)
1 episodes
 Tearmoon Empire
Tearmoon Empire
2023 1 eps 7.1
Soldier (voice)
Tearmoon Empire
Oct 8, 2023
Soldier (voice)
1 episodes
 Tearmoon Empire
Tearmoon Empire
2023 1 eps 7.1
Merchant (voice)
Tearmoon Empire
Oct 8, 2023
Merchant (voice)
1 episodes
 ID: INVADED
ID: INVADED
2020 1 eps 7.2
Staff (voice)
ID: INVADED
Jan 6, 2020
Staff (voice)
1 episodes
 Remake Our Life!
Remake Our Life!
2021 1 eps 7.3
(voice)
Remake Our Life!
Jul 3, 2021
(voice)
1 episodes
 Inexpressive Kashiwada and Expressive Oota
Inexpressive Kashiwada and Expressive Oota
2025 1 eps 7.2
Mathematics Teacher (voice)
Inexpressive Kashiwada and Expressive Oota
Oct 4, 2025
Mathematics Teacher (voice)
1 episodes
 The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
2023 1 eps 7.1
Sebas (voice)
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
Apr 3, 2023
Sebas (voice)
1 episodes
 Turkey! Time to Strike
Turkey! Time to Strike
2025 1 eps 6.3
Samurai (voice)
Turkey! Time to Strike
Jul 9, 2025
Samurai (voice)
1 episodes

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Koji Seki
Koji Seki
Koji Seki
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