Kōki Ōsuzu

Born in Tokyo on October 5, 2000, Kōki Ōsuzu made his voice acting debut in 2021 after training at the Japan Narration Acting Institute. His interest in the craft was sparked by Natsuki Hanae's performances in Tokyo Ghoul and Your Lie in April. Best known for his lead roles as Ashito Aoi in Aoashi, Kattan in Gakkou de wa Oshierarenai Taisetsu na Koto, and supporting work in Edens Zero. Affiliated with talent agency VIMS.

Kōki Ōsuzu’s Rise Through Sports Anime and Beyond

Born in Tokyo on October 5, 2000, Kōki Ōsuzu (大鈴功起) is a Japanese voice actor affiliated with VIMS who made his industry debut in 2021. His path into voice acting was shaped during middle school, when watching performances by Natsuki Hanae in Tokyo Ghoul and Your Lie in April sparked a deep admiration that pushed him toward the craft. After entering high school, he enrolled at the Japan Narration Acting Institute to train seriously.

Most Known Roles of Kōki Ōsuzu

Kattan – Gakkou de wa Oshierarenai Taisetsu na Koto (TV)

Hyoga – Edens Zero (TV, 2023)

Shimodaira Kanna – (supporting, TV)

Sam Brown – (supporting role)

Ken – Yano-kun’s Ordinary Days (TV, 2025)

Aoashi and the Lead Role That Defined His Early Career

The 2022 TV anime Aoashi, a football (soccer) drama, handed Ōsuzu his first lead role as protagonist Ashito Aoi – a raw, passionate youth fighting his way into professional youth football. The role was a major leap for a voice actor barely a year into his career, and he has cited it publicly as his personal “origin point” in the industry. The physical and emotional demands of the character – frequent shouting, high-intensity match scenes – set a demanding benchmark that shaped his subsequent approach to casting.

Expanding into Other Genres

Since Aoashi, Ōsuzu has taken on a steady spread of supporting roles across genre anime, including appearances in Zom 100: Bucket List of the Dead (2023), Dandadan (2024), and Inexpressive Kashiwada and Expressive Oota (2025). His hobbies – rakugo (traditional comic storytelling) and video games – are listed as personal interests that inform his character work. His special skill is basketball, a natural fit given the athletic energy he brought to Aoashi.