Japan's former women's world No. 1 Ai Miyazato, a nine-time winner on the U.S. LPGA Tour, will retire at the end of this season, her management said Friday.The 31-year-old, whose tally on the tour ranks second among Japanese behind Ayako Okamoto's 17, will hold a press conference on Monday to announce her decision.In December 2005 at the Okinawa Open, Miyazato was the first woman to compete in an event on the JGTO, the Japan men's tour. Katsumasa Miyamoto a 10-time winner on the JGTO, played a round in that event with the youngster."This is a surprise, for sure," Miyamoto said. "But Ai-chan…READ FULL ARTICLE