their Demio (Mazda2) subcompact, powered by biofuel. In 2022, Toyota and Subaru entered special versions of their GR86 and BRZ sports cars, adapted to run on carbon-neutral synthetic fuel. That same year, Nissan entered a "Racing Concept" version of their new Fairlady Z (RZ34) sports car, which served as the prototype for the upcoming Nissan Z GT4. Mazda introduced a new biodiesel concept, the Mazda3 Bio Concept, at the end of 2022. Champions ST-X/GT3 Class (2011-present) Bold drivers indicate a driver that was entered in every race for their respective team. Drivers listed in italics competed in a select number of rounds for their respective team. ST-Z Class (2017-present) Bold drivers indicate a driver that was entered in every race for their respective team. Drivers listed in italics competed in a select number of rounds for their respective team. ST-TCR Class (2017-present) Incidents During a 2012 race at Suzuka Circuit (a support event for the 2012 FIA WTCC Race of Japan), Osamu Nakajima, driving a Nissan Fairlady Z (Z33), died after he crashed into a barrier on the first turn of the circuit. References External links Auto racing series in Japan Group GT3 GT4 (sports car class)