The 2020 Autobacs Super GT Series was motor racing championship based in Japan for grand touring cars. The series is sanctioned by the Japan Automobile Federation (JAF) and run by the GT Association (GTA). It was the twenty-eighth season of the Japan Automobile Federation Super GT Championship which includes the All Japan Grand Touring Car Championship (JGTC) era and the sixteenth season the series to compete under the Super GT name. It was the thirty-eighth overall season of a JAF national sportscar championship dating back to the All Japan Sports Prototype Championship.
Team Kunimitsu and drivers Naoki Yamamoto and Tadasuke Makino won the Drivers' and Teams' Championships in GT500 for Honda and their new NSX-GT with a front-engine layout. They clinched the championship in the final lap of the final race of the season, after championship rivals TGR Team KeePer TOM's and driver Ryo Hirakawa ran out of fuel at the final corner. Nissan customer racing team Kondo Racing and drivers Kiyoto Fujinami and João Paulo Lima de Oliveira won the GT300 class championships in the second-generation GT-R NISMO GT3.