Shiho Oyama saved par with a six-foot putt on the second playoff hole to defeat Hiroko Yamaguchi and South Korea's Shin Sora and win the Belluna Ladies Cup on Sunday.
It was the 23-year-old Oyama's first win on the Japanese LPGA circuit since she turned pro three years ago.
Oyama prevailed when she chipped to within six feet of the par-4 18th before rolling in the putt after Yamaguchi and Sora had both come up short on the green.
Teeing off six strokes off the pace, Oyama birdied her final two holes for a total of five birdies in a blemish-free round of 5-under par 67.