The 2021 Japanese Super Formula Championship was the forty-ninth season of premier Japanese open-wheel motor racing, and the ninth under the moniker of Super Formula. Naoki Yamamoto entered the 2021 season as the defending drivers' champion.
Tomoki Nojiri took his first drivers' championship at the penultimate round at Motegi, while Team Impul took their first teams' championship since 2010 at the season finale.