South Korea's Sun-Ju Ahn won the Toto Japan Classic on Sunday beating countryman Ji-Hee Lee and American Angela Stanford with a birdie on the first hole of a play-off.
The 28-year-old finished with a five-under-par 67 to match Stanford with a 67 and Lee 66 at 16-under 200. Ahn began the final day two shots off the lead in a tie for third.
On the 18th hole, Ahn missed a 13-foot birdie putt that would have given her the win but got the victory when given another go at the hole in the play-off.
Stanford, who has won five LPGA Tour titles, last won in 2012.
Second round leader Jenny Shin of South Korea shot a 70 to finish a stroke back.
Thailand's Ariya Jutanugarn shot the best round of the week with a 64 to finish fifth at 14-under.
World number three Stacy Lewis, who shot a 68, and No.4 Lexi Thompson on 69, finished at 12-under.