Katie Futcher and Louise Stahle each carded rounds of 3-under 69 in round three to climb into a tie for second place at 4-under-par 212. They were joined there by Lee Ann Walker-Cooper (74).
Sarah Jane Kenyon fired the low round of the day, a 5-under 67, to get to minus-3 where she is alone in fifth place. Kate Golden, Becky Iverson, Nicole Jeray and Karin Sjodin are one shot further back at 2-under-par 214.
Miyazato struggled on the front nine at LPGA International on Friday. She played the opening nine holes in 2 over par. The 20-year-old caught fire on the back nine though.
She ran off four birdies in a six-hole span to climb up the leaderboard. Miyazato got up and down for par at the last to keep her big lead.
'Nothing changes,' said Miyazato of her plans for the next two rounds. 'Paula (Creamer) won with 11 under last year. I think with 2 under, I could probably get close to that number.'
Brooke Tull posted an even-par 72 on Friday. She is alone in 10th place at 1-under-par 215.
Morgan Pressel, who shared the lead after round one and is reigning the U.S. Women's Amateur Champion, struggled to her second straight 3-over 75 to fall to even-par 216 after three rounds.
Pressel was joined there by Aram Cho, Julieta Granada, Teresa Lu, Shinobu Moromizato, Angie Rizzo and Veronica Zorzi.
The 90-hole tournament will cut to the low 70 players and ties after the fourth round. Twenty-four players will gain exempt spots on the 2006 LPGA Tour. The next 35 finishers and ties will earn conditional status for 2006.