Sun-Ju Ahn has won the Toto Japan Classic on Sunday for her first LPGA Tour victory, beating fellow South Korean player Ji-Hee Lee and American Angela Stanford with a birdie on the first hole of a playoff.
The 28-year-old Ahn closed with a five-under-par 67 at Kintetsu Kashikojima to match Stanford and Lee at 16-under 200.
Stanford also shot 67, and Lee had a 66.
The 37-year-old Stanford won the last of her five LPGA Tour titles in 2012.
She dropped to 1-4 in playoffs, including a loss in the 2003 US Women's Open.
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South Korea's Jenny Shin, the second-round leader, had a 70 to finish a stroke back.
Thailand's Ariya Jutanugarn closed with a 64 - the best round of the week - to finish fifth at 14 under after beginning the day tied for 29th.
Third-ranked Stacy Lewis and world No.4 Lexi Thompson topped the group at 12 under.
Lewis shot a 68, and Thompson had a 69. Thompson won three weeks ago in South Korea for her second victory of the year.
Karrie Webb was the best-placed Australian at two under after an even par final round.
