South Korea's Na Da Ye shot a final-round 5-under-par 67 on Sunday to seal a wire-to-wire victory at the Meiji Cup, her first win on the Japan LPGA tour.
Na, who failed to make the cut in her previous two events, carded six birdies against a lone bogey at Sapporo Kokusai Country Club in Hokkaido to finish at 12-under-par 204, a stroke ahead of hard-charging Yuki Ichinose.
The 24-year-old Ichinose finished her tournament by shooting a 7-under-par 65 in a seven-birdie round. Feng Shanshan of China, who won this event for the past two years, was third a stroke further back at 10 under.
South Korea's Kang Soo Yun and Taiwan's Teresa Lu were tied for fourth at 8 under.
The 25-year-old Na, who first joined the Japan tour in 2009, earned a 16.2 million yen pay day for her maiden victory.