General Motors, which is reducing its staff in Japan, will leave the nation's major car makers' lobby group in September, a company spokesman told Associated Press (AP) on Tuesday. Detroit-based GM became the first foreign member of the Japan Automobile Manufacturers Association in 2002 when its Japanese partner Suzuki Motor began making the Chevrolet Cruze, AP said. Suzuki will continue making the Cruze under its own name, rather than under General Motors', GM spokesman Masaaki Gotsubo told AP.