Unusually calm winds left Ko Olina Golf Club vulnerable in Wednesday’s opening round of the LPGA Lotte Championship.

Yet another unusually gifted teenager took the place apart, with a bunch of adults and a few other kids right behind.

Ariya Jutanugarn bolted into the lead with a tournament-record 8-under-par 64. She is one shot ahead of 10-time LPGA champion Suzann Pettersen and 11-time Korean LPGA champion Hee Kyung Seo.

Danielle Kang and Hyo Joo Kim share fourth at 66.

Kim and Jutanugarn, both 17, played with 15-year-old amateur Lydia Ko, who became the youngest ever to win an LPGA event last year. The sum of their ages is less than the oldest player here, 52-year-old Juli Inkster.

"It was very fun today because everybody is young and they are so good," Jutanugarn said. "It’s very fun because we are friends."

Defending champion Ai Miyazato and Stacy Lewis, who dropped to No. 2 in the Rolex World Ranking this week, shot 67 to grab a share of sixth.

Ko, Kim and Jutanugarn, who play together again today, aren’t even LPGA members. The 17-year-olds recently turned pro and headed to tours in Korea and Europe this year. Both have already won.

It was easy to see why on Wednesday, when Ko Olina was at its benign best, inviting 77 players to break par. One was Hawaii’s Michelle Wie, who shot 70. Stephanie Kono, another Punahou graduate, finished at 73.

Kono and Jutanugarn qualified Sunday, with Jutanugarn birdieing four of the last six holes. She remained on that ridiculous roll Wednesday, making the turn in 6-under 30 — hitting the pin with her approach shot to No. 9 for emphasis.

"I played really confident when I was qualifying and it made me really confident today," she said. "My shots, everything just came, and it wasn’t very hard to shoot under par because I’m really confident with my game."

Her only bogey came at the 10th, but she drained a 10-foot eagle putt at the 14th to tie Pettersen and dropped in her only long putt of the day on the next hole to grab the lead alone.

Jutanugarn is the daughter of a golf shop owner in Bangkok. Her sister Moriya, who opened with a 69, is a year older and was co-medalist at the LPGA Q-School. The tour denied Ariya’s petition to go to Q-School before her 18th birthday.

She received a sponsor’s invitation to play the Honda LPGA Thailand earlier this year and took a two-shot lead to the final hole. A triple bogey denied her the title.

Her worst finish in four European tour starts is 25th and she leads the Order of Merit. Jutanugarn, the AJGA Rolex Junior Player of the Year in 2011 and 2012, is now ranked 35th in the world.

Pretty much everybody ahead of her is here. Pettersen is sixth. She powered through Ko Olina early, when the wind speed never hit double digits. The Norwegian had nine birdies, and nine 3s on her card.

She also needed just 25 putts, which made her father happy.

"I tried to be really aggressive," Pettersen said. "My dad was so disappointed after the Kraft that I left all the putts short."

Pettersen averaged 237 yards on her measured drives Wednesday. Jutanugarn’s average was 275, with a few 300 yards-plus and a few doglegs simply ignored. Between qualifying and the first round, she has missed three greens in regulation.

"My irons helped me a lot today," she said. "I hit it very close on my second shot. But my driver makes me confident about the second shot."