American Angela Stanford has propelled herself to the top of the Lotte Championship leaderboard after a superb second round of 64 took her to eight-under in Hawaii.
She is one of three Americans firmly in contention at the halfway stage, with Michelle Wie's 67 on Friday good enough to leave her second on seven-under and Cristie Kerr (66) one of four players a shot behind.
South Korean trio Hyo Joo Kim, So Yeun Ryo and Se Ri Pak had led the tournament after first round scores of 68.
Kim and Ryu carded rounds of 70 on Friday to join Kerr on six-under, along with compatriot and world number one Inbee Park (68), while Pak's round of 71 means she is on five=under along with another South Korean Ha Na Jang (69).
Japan's Haru Nomura, American Katie Burnett and 16-year-old South Korean amateur So Young Lee are four shots off the lead.
English duo Karen Stupples and Felicity Johnson both missed the cut with the former carding a 75 to finish five over par and the later ending 11 over courtesy of a 76.
Five-time LPGA Tour winner Stanford, 36, was in stellar form on the front nine, recording five straight birdies from the third hole to the seventh, before adding a further three birdies on the back nine.
It was her lowest round since the 2013 Marathon Classic.
"I guess it's been a while," said Stanford. "It was nice to have today because I've had these stretches where I've played good in a round and then I'll make a bogey or two and kind of lose my focus.
"Finally I got comfortable on these greens and it felt great.
"To see the ball go in that much is a lot of fun. I needed a round like that."
Wie, playing in her home state and coming into the tournament off the back of finishing runner-up in the Kraft Nabisco Championship, also scored a bogey-free round that included five birdies.
"I'll take five under par," said Wie. "I knew I could have made a couple more birdies out there on the last couple of holes, but I'll take it."