Koji Seki
Actor
Born Nov 25, 1982 · Saitama, Japan
Active 2012–present · 5′7″ (169 cm)
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.
Filmography
You and I Are Polar Opposites (2026) — Convenience Store Manager (voice)Akane-banashi (2026) — Chusuke Chuotei (voice)Summer Pockets (2025) — (voice)Turkey! Time to Strike (2025) — Samurai (voice)Catch Me at the Ballpark! (2025) — Kaiser (voice)JUJUTSU KAISEN (2020) — Fumi's Father (voice)SPY x FAMILY (2022) — Rahden (voice)Haikyu!! (2014) — Kai Akakura (voice)Sword Art Online (2012) — Goblin (voice) · Technical Staff (voice)Frieren: Beyond Journey's End (2023) — Villager (voice)Dan Da Dan (2024) — Male Teacher (voice) · Male Client (voice) · TV Station Producer (voice)The Quintessential Quintuplets (2019) — Homeroom Teacher (voice) · Teacher (voice)BLUE LOCK (2022) — Reporter B (voice)Tower of God (2020) — (voice)I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too (2023) — (voice)Star Wars: Visions (2021) — Eno's Father / Resistance Member (voice)HAIKYU!! The Dumpster Battle (2024) — Patient (voice)I've Been Killing Slimes for 300 Years and Maxed Out My Level (2021) — Store Customer E (voice)NieR:Automata Ver1.1a (2023) — Machine Creature (voice) · Kingdom Citizen (voice)Yashahime: Princess Half-Demon (2020) — Raccoon dog in Mamiana Island (voice) · Yokai (voice) · Staff member (voice) · Green ogre (voice) · Palanquin Carrier (voice) · Rock Demon (voice) · Demon (voice) · Fisherman (voice) · Vassal (voice) · Townsfolk (voice) · Subordinate (voice) · Bird of Paradise (voice) · Peasant (voice) · Villager (voice) · Chimimoryo (voice) · Old man (voice) · Guard (voice) · Peddler (voice) · Official (voice) · Thug (voice)Daily Lives of High School Boys (2012) — Boy B (voice) · Basketball Guy (voice)Sword Art Online the Movie – Progressive – Scherzo of Deep Night (2022) — Naijan (voice)March Comes In Like a Lion (2016) — Authorized Person 3 (voice)Orb: On the Movements of the Earth (2024) — Knight (voice)