The Japanese Touring Car Championship, was a former touring car racing series held in Japan, the series was held under various regulations during its existence, including international categories such as Group A, was a set of motorsport regulations introduced by which organization, covering production-derived vehicles intended for outright competition in Touring car racing and Rallying?
Japanese Touring Car Championship:  The series was held under various regulations during its existence, including international categories such as Group A and Super Touring, which allowed both Japanese and foreign built cars to compete. Group A: Group A was a set of motorsport regulations introduced by FIA covering production-derived vehicles intended for outright competition in Touring car racing and Rallying.
FIA