In her 2004 rookie season on the JLPGA Tour Miyazato won five tournaments. In February 2005, she represented Japan along with
Rui Kitada and won the inaugural
Women's World Cup of Golf. In 2005, she won six events on the JLPGA tour, and was the #2 ranked player on the JLPGA Tour behind
Yuri Fudoh. In winning the Japan Open Championship at age 20 in 2005, Miyazato became the youngest player on the JLPGA Tour to win a major. Furthering the notion that Miyazato revived the JLPGA Tour after the retirement of
Ayako Okamoto, over 32,000 spectators, the largest gallery ever to attend a JLPGA event, witnessed the final round. At the LPGA
Qualifying Tournament in Florida in December 2005, Miyazato easily secured her tour card for the
2006 season. She was under-par in four of the five rounds, and was 12 strokes ahead of the closest competitor, which set a record for the largest margin of victory. Back in Japan, on 15 December, she played the opening rounds of the Okinawa Open, becoming the first Japanese woman to compete in a domestic men's professional event, although she failed to make the cut for the final rounds. In Miyazato’s fourth season on the LPGA Tour in
2009, she earned her first win at the
Evian Masters in
France, defeating
Sophie Gustafson at the first hole of a sudden-death playoff. In
2010, Miyazato won four of the first nine official tournaments on the LPGA Tour and on 21 June rose to number 1 in the
Women's World Golf Rankings. She held the spot for only one week and was replaced by
Cristie Kerr who held the spot for three weeks, before Miyazato regained the spot again on 19 July, by a narrow margin of 0.0006 average points. In August, Miyazato won for the fifth time in 2010 at the
Safeway Classic in Oregon, with a two-stroke victory over Kerr and
Na Yeon Choi. She regained the top spot in the world rankings, which had been briefly retaken by Kerr, but then gave it up to Kerr on 25 October. In
2011, Miyazato won the Order of Merit on the
Ladies European Tour (LET), despite only playing in two events on that tour, the co-sponsored events with the LPGA. The LET has no minimum tournament requirements for membership and her second win at the
Evian Masters, whose purse is much larger than most LET events, earned her enough to top the list. In April 2012, Miyazato won her eighth LPGA event at the inaugural
LPGA Lotte Championship in
Hawaii, four strokes ahead of runners-up
Azahara Muñoz and
Meena Lee. Miyazato has endorsements deals with
Suntory,
Bridgestone Corporation,
Japan Airlines,
Oakley,
Honda, Hisamitsu,
Mitsubishi Electric and
NTT Docomo. Her older brothers,
Kiyoshi Miyazato and
Yūsaku Miyazato are also professional golfers. She is not related to fellow Japanese LPGA Tour player
Mika Miyazato. On 27 May 2017,
Kyodo News Agency reported that Miyazato would retire at the end of the season. Her last tournament was the
2017 Evian Championship. Miyazato is the first golfer to have achieved the world number one ranking without ever winning a major. Her best finish was third three times. ==Professional wins (25) ==