The 2021 Formula Regional Japanese Championship was a multi-event, Formula 3 open-wheel single seater motor racing championship held in Japan. The drivers competed in Formula Regional cars that conform to the FIA Formula Regional regulations for the championship. This was the second season of the championship, promoted by K2 Planet.[1]
The season started on 26 June and concluded on 12 December. Yuga Furutani took the drivers' title ahead of Ai Miura, while his team TOM'S Youth won the teams' title and Takashi Hata earned Masters' class honors.