Japan's oldest operating sports car championship since 1991, run as a pro-am endurance series across the country's major circuits. Two four-hour races at Sportsland SUGO — a 3.7km hillside layout with 70 metres of elevation change per lap, owned by Yamaha Motor Company since opening in 1975. Nine race classes compete simultaneously, from GT3 and GT4 machinery to minimally modified production vehicles.
