Kang, bidding for her first LPGA Tour title, is tied with Chella Choi of South Korea at 10-under 203 entering the final 18 holes of the year's second major. "I think tomorrow is going to be a little bit hotter and also windy, so I try to enjoy the wind, like a friend", she said. "To be able to represent my country at the Olympics a year ago and every time I'm out on the course all over the world. Of course (it is) very exciting (to lead), because this is big tournament, so I wanted to play well and today played so well", Choi, a one-time LPGA victor, said.
"I've been working on my game every day to get better", Kang said.
Kim turned in a solid round with six birdies and one bogey. Her lone bogey of the day came on the par-four third but she responded with birdies at the par-four fifth, par-three seventh and par-four eighth.
On the final hole, Henderson's approach to the green came up just short and left her in deep grass on the bank of a bunker setting up a hard chip from an awkward lie. She played the back nine in 5-under 30 to grab the clubhouse lead while Kang and the leaders were out on the course.
Choi said she sympathised with Thompson, but also had learned a lesson.
Henderson will tee off in the second-to-last group Sunday with Shin at 1:31 p.m ET.
And defending champion Brooke Henderson, after making three back-nine birdies, was nipping at the leaders' heels at 8-under before missing short putts on the 17th and 18 holes.
"If I win (Sunday)", Henderson said, "I think that would be the best present I could give them".
Canadian Henderson also finished strongly with three late birdies, before downplaying her chances of defending the title she won after a playoff with Lydia Ko a year ago.
Newly-crowned women's world No. 1 Ryu So-yeon, who won the year's first major at the ANA Inspiration, made a smooth start with a tidy 69 in front of a small afternoon gallery that included her mother Cho, the cathedral-like silence on the course broken mainly by an occasional passing train along the line that runs adjacent to the first fairway. She finished tied for fourth, tied for second and tied for third in her past three events.
The No. 9 player in the Rolex Women's World Golf Rankings, Yang holed out from 192 yards to record the lone eagle of the day on the North Course's 377-yard 2nd hole.
Her first putt from about 50 feet refused to break left and she missed from about four feet for par.
"So just trying to be in the fairway, be on the greens, and create enough birdie chances".