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Kousuke Oonishi
ACTOR

Kousuke Oonishi

Known for Chainsaw Man · Sword Art Online · Jujutsu Kaisen 0

Kousuke Oonishi (大西 弘祐, Ōnishi Kōsuke, born May 7, 1991) is a Japanese voice actor (seiyū) from Saitama prefecture who is associated with Arts Vision. He graduated from the Nihon Narration Engi Kenkyūjo (Japan Narration Acting School). His hobbies and special skills are puns and singing.

Snapshot 2026-10-16

Born
May 7, 1991
Birthplace
Saitama, Japan
Known For
Acting

Biography

Kousuke Oonishi (大西 弘祐, Ōnishi Kōsuke, born May 7, 1991) is a Japanese voice actor (seiyū) from Saitama prefecture who is associated with Arts Vision. He graduated from the Nihon Narration Engi Kenkyūjo (Japan Narration Acting School). His hobbies and special skills are puns and singing.

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Known For

TVChainsaw Man
Chainsaw ManHenchman C (voice) · 2022
★ 8.5
TVSword Art Online
Sword Art OnlinePlayer (voice) · 2012
★ 8.1
MOVIEJujutsu Kaisen 0
Jujutsu Kaisen 0Passerby (voice) · 2021
★ 8.1
TVVinland Saga
Vinland SagaMember of Askeladd's Mercenaries (voice) · 2019
★ 8.5
TVThe God of High School
The God of High SchoolDoctor (voice) · 2020
★ 8.1
TVDomestic Girlfriend
Domestic GirlfriendYouth A (voice) · 2019
★ 8.1
TVThe Ancient Magus' Bride
The Ancient Magus' BrideMartin Chandler (voice) · 2017
★ 8.4
TVNoblesse
NoblesseM-21 (voice) · 2020
★ 8.4

Filmography

Movies

Jujutsu Kaisen 0Passerby (voice)
2021

Television

Sword Art OnlinePlayer (voice) · 1 eps
2012
Flowers of EvilClass 1, Year 2 (voice) · 2 eps
2013
JOKER GAMECorporal Nobuteru Miyata (voice) · 1 eps
2016
Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side: Sword OratoriaMember (voice) · 1 eps
2017
The Ancient Magus' BrideMartin Chandler (voice) · 7 eps
2017
The Ancient Magus' BrideStudent A (voice) · 1 eps
2017
The Ancient Magus' BrideTransfigured Sorcerer (voice) · 1 eps
2017
The Ancient Magus' BrideBuyer (voice) · 1 eps
2017
The Ancient Magus' BrideMan from the Neighborhood (voice) · 1 eps
2017
The Ancient Magus' BridePerson from Joseph's Village (voice) · 1 eps
2017
The Ancient Magus' BrideChise's Classmate (voice) · 1 eps
2017
The Ancient Magus' BrideGatekeeper (voice) · 1 eps
2017
Cells at Work!Intestinal Epithelial Cell 1 (voice) · 2 eps
2018
We Rent TsukumogamiCustomer (voice) · 1 eps
2018
Domestic GirlfriendYouth A (voice) · 1 eps
2019
Vinland SagaMember of Askeladd's Mercenaries (voice) · 4 eps
2019
Vinland SagaEnglish Soldier (voice) · 1 eps
2019
Vinland SagaInterpreter of Jabbathe's Forces (voice) · 1 eps
2019
Vinland SagaSoldier of the English Army (voice) · 1 eps
2019
Vinland SagaViking of Thorkell's Troops (voice) · 3 eps
2019
ArteApprentice (voice) · 1 eps
2020
NoblesseM-21 (voice) · 13 eps
2020
The God of High SchoolDoctor (voice) · 1 eps
2020
The God of High SchoolStore Manager (voice) · 1 eps
2020
The God of High SchoolYES MAN (voice) · 1 eps
2020
The God of High SchoolDelinquent (voice) · 3 eps
2020
The God of High SchoolGuard (voice) · 1 eps
2020
The God of High SchoolSecretary (voice) · 1 eps
2020
The God of High SchoolSpectator (voice) · 4 eps
2020
The Faraway PaladinVillager (voice) · 2 eps
2021
The Faraway PaladinAdventurer (voice) · 3 eps
2021
The Faraway PaladinKnight (voice) · 1 eps
2021
The Saint's Magic Power Is OmnipotentYoung officer (voice) · 1 eps
2021
The Saint's Magic Power Is OmnipotentChef (voice) · 1 eps
2021
The Saint's Magic Power Is OmnipotentSoldier (voice) · 1 eps
2021
The Saint's Magic Power Is OmnipotentCivil official (voice) · 1 eps
2021
The Saint's Magic Power Is OmnipotentAlchemist (voice) · 1 eps
2021
Those Snow White NotesUshio's Male Friend (voice) · 1 eps
2021
Those Snow White NotesJiro Fujiwara (voice) · 1 eps
2021
Bibliophile PrincessMan at the Market (voice) · 1 eps
2022
Chainsaw ManHenchman C (voice) · 1 eps
2022
The Heike StoryTaira Soldier 1 (voice) · 1 eps
2022
Campfire Cooking in Another World with My Absurd SkillSoldier B (voice) · 1 eps
2023
Campfire Cooking in Another World with My Absurd SkillCity ​​People (voice) · 1 eps
2023
Campfire Cooking in Another World with My Absurd SkillAdventurer C (voice) · 1 eps
2023
My DaemonSoldier 3 (voice) · 1 eps
2023
My DaemonSoldier 2 (voice) · 1 eps
2023
My DaemonSoldiers (voice) · 1 eps
2023
My Happy Marriage(voice) · 1 eps
2023
Reborn to Master the Blade: From Hero-King to Extraordinary Squire ♀Knight (voice) · 1 eps
2023
Tearmoon EmpireMan (voice) · 1 eps
2023
Tearmoon EmpireSoldier (voice) · 2 eps
2023
Tearmoon EmpireStudent (voice) · 1 eps
2023
Tearmoon EmpireReferee (voice) · 1 eps
2023
The Café Terrace and Its GoddessesFishmonger's Companion (voice) · 2 eps
2023
HaigakuraDragon Warrior (voice) · 1 eps
2024
HaigakuraIslander (voice) · 1 eps
2024
HaigakuraChild (voice) · 1 eps
2024
HaigakuraKashi (voice) · 1 eps
2024
HaigakuraSoldier (voice) · 2 eps
2024
HaigakuraSanu's Companion (voice) · 1 eps
2024
Terminator ZeroParamedic (voice) · 1 eps
2024
Vampire DormitoryGuest E (voice) · 1 eps
2024

Photos

Kousuke Oonishi photo
Kousuke Oonishi photo
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