The 2021 F4 Japanese Championship season was the seventh season of the F4 Japanese Championship. It held a total of 14 races over four double-header rounds and two triple-header rounds.
All teams were Japanese-registered.
All rounds were held in Japan and support the Super GT events. The revised calendar was published on 10 February 2021. The second round of the championship at Suzuka Circuit was postponed from 29âÂÂ30 May to 21âÂÂ22 August due to COVID-19 pandemic. The nomenclature was kept, despite the round at Twin Ring Motegi being held in the meantime.
Points were awarded as follows:
Only the best finisher scored points for their team.