Formula Regional Oki started his formula racing career in
2022 Formula Regional Japanese Championship with
TOM'S where he shared with Yorikatsu Tsujiko. On his fifth race, he clinched his first win in
Sportsland SUGO, and another in the final race in
Suzuka Circuit. Oki continued to race with
Ponos Racing, as he raced for two rounds to replace Tsujiko. He also won in his first race.
Super Taikyu Oki made his full season racing debut in Super Taikyu ST-X on 2023 for Naniwa Denso
Team Impul alongside Yuki Tanaka, and Super GT champion
Kazuki Hiramine. Oki continued to race with the same team for 2024.
Super GT In 2024, Oki was announced to be the driver for
GAINER team alongside
Ryuichiro Tomita and
Keishi Ishikawa for the last round at Suzuka. Oki did not race on the weekend, but would make his season debut in 2025, where he replaced Ishikawa. ==Racing record==