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 and Super Touring, which allowed both Japanese and foreign built cars to compete. The final edition of the championship was held in 1998, although a failed attempt at a relaunch was planned for 2012. A relaunched series, the TCR Japan Touring Car Series, began in 2019, using TCR regulations.

Group A is a set of motorsport regulations administered by the FIA covering production derived touring cars for competition, usually in touring car racing and rallying. In contrast to the short-lived Group B and Group C, Group A vehicles were limited in terms of power, weight, allowed technology and overall cost. Group A was aimed at ensuring numerous entries in races of privately owned vehicles.