1993 All Japan Grand Touring Car Championship
The 1993 All Japan Grand Touring Car Championship was the inaugural season of the Japan Automobile Federation All Japan Grand Touring Car Championship. It was also the eleventh season of a JAF-sanctioned sports car racing championship dating back to the All Japan Sports Prototype Championship (JSPC), which had folded after the 1992 season.
Originally, the series was part of a nine-round championship called the Inter-Circuit League (ICL), which was formed as a last-ditch effort to save the JSPC. Five of the proposed ICL rounds were cancelled due to a lack of entries, and only one race, the Suzuka 1000km, would feature both Group C prototypes and GT cars (as well as cars from the N1 Endurance Series).
The remaining JGTC rounds were staged as joint events with the IMSA GT Championship or the Japan Super Sports Sedan Championship (JSS). Nismo was the only team that built and entered any cars to the new JAF N-GT regulations. Because the format and structure of the races were so different from what would come in future seasons, the 1993 season is not officially recognized by the GT Association (GTA), which was incorporated in October 1993 to manage the All Japan GT Championship (later to become Super GT).
Masahiko Kageyama, the only full-time driver in the GT1 category, was declared the champion, driving a Nissan Skyline GT-R. He would also win the final All-Japan Touring Car Championship to be run to Group A regulations in the same year.