When the name of the sport is mentioned, most people would probably say they have heard of it. But they probably don't know how difficult it is to play it in Japan.

News photoChinatsu Matsui plays squash Sunday as a young student looks on at Central Sports Yokohama Kita facility during a junior charity tournament. Matsui, a professional since 2002, advanced to the Asian Games quarterfinals. KAZ NAGATSUKA PHOTO

That's where Chinatsu Matsui comes in.