関幸司

Nato il 25 novembre 1982 a Saitama, Japan.

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.

Haikyu!! L'asso del volley (8.6) Haikyu!! Serie · 2014 come Kai Akakura (voice)

Umamusume: Pretty Derby - Beginning of a New Era (8.5) Film · 2024 come (voice)

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 Serie · 2023 come (voice)

HAIKYU!! Battaglia all'ultimo Rifiuto (7.8) HAIKYU!! The Dumpster Battle Film · 2024 come Patient (voice)

Sword Art Online The Movie: Progressive - Scherzo of Deep Night (7.7) Sword Art Online the Movie – Progressive – Scherzo of Deep Night Film · 2022 come Naijan (voice)

DanDaDan: First Encounter (7.5) DAN DA DAN: First Encounter Film · 2024 come TV Station Producer (voice)

Summer Pockets (6.9) Serie · 2025 come (voice)

Lasciate ritirare questo Grieving Soul! (6.6) Let This Grieving Soul Retire Serie · 2024 come Greg Zangief (voice)