Watch Double Clutch (1978) Official Trailer

Hiromi Go plays a high school student who needs a role model in his life badly. He's raised by his older sister played by Keiko Matsuzaka who is a hostess at a night club. She meets a man who becomes her boyfriend. He races in a off-road car rally professionally. The same man becomes Go's role model and teaches him sophisticated car driving techniques. One of the techniques taught is 'double clutch' ( Thus the movie's title Double Kuracchi ) to make gear transition smoothly between shifts. Hiromi Go was a big pop idol in Japan when this movie was created. Both Go and Matsuzaka still enjoys high celebrity status in Japan.