Hataoka was unable to stay in the playoff for long, settling for par on the first hole. She hit a flawless flop to 3-feet and saved par.
The back-to-back birdies by Ryu and two late bogeys by Henderson turned things in a hurry.
As well as she played, Ryu also got an assist at the par-five seventh, where her second shot landed in a woman's food container, probably preventing the ball from going into a water hazard. She took a double-bogey 6 on the second hole but rallied back with birdies on holes 6 and 7.
A par at the first playoff hole ended Hataoka's chances, with both Ryu and Park making birdies there.
"I got less nervous during the playoff".
Park was four behind Ryu at the start of the day at seven-under.
Park just missed a birdie on that hole when her 20-footer hit the edge of the cup.
Four of the top 10 finishers on Sunday were American golfers including Jessica Korda, who finished T4.
The matched birdies on the first playoff hole sent Park and Ryu to No. 16 to continue their duel.
With the temperature reaching the mid-30Cs at Kemper Lakes in Ilinois, the 23-year-old mixed two bogeys with four birdies to fire a second-round 70.
In taking the title she becomes just the third Korean to win the KPMG Women's PGA Championship. Hataoka, who was already in the clubhouse after a 64, and Park were within one shot of the lead at that point.
The 2023 Women's PGA Championship will be the third women's major at Baltusrol and the second for the lower course, where Mickey Wright won the 1961 US Women's Open.
Park moves to No. 2 in the world while Ryu moved up a spot to No. 4.
It is truly and worldwide leaderboard as the top five players represent four countries, Canada, USA, South Korea and England.
"I fought, I played well", said Yin.
"Winning this tournament is going to be huge because I never really dreamed about becoming a Grand Slammer", she said.
"The tears came today because she understood how hard it was to win this week", Jones said.
Hataoka rolled her putt way right and was eliminated from contention. After she came out of nowhere previous year to win the U.S. Women's Open, I think the expectation was that she should be winning every week.
For the fourth consecutive year Henderson finished inside the top six at this major championship.