The All Japan Road Race Championship is the premiere motorcycle road racing championship in Japan It is run by the Motorcycle Federation of Japan (MFJ) – the Japanese affiliate of the FIM.
The MFJ was formed in 1961 and held its first motorcycle road race in 1967.
The Championship's premiere class for a number of years had been the 500ccm class but it was replaced by a superbike class in 1994. During the 2002 season the championship was used by some manufacturers to test their MotoGP prototypes. The prototypes usually won the races but were not eligible for points. The series now runs a small seven round schedule but has a large field of Japanese riders and bikes.
Since 1994, the Superbike class is the highest category of the series. Hence the Japanese Superbike Championship is one of the most important national championships in the world.
The relatively liberal regulations enable the manufacturers to use special parts. The Japanese brands in particular test their bikes and riders in this racing series.