Nasa Hataoka won the NW Arkansas Championship on Sunday for her maiden LPGA title with a tournament record 21-under-par 192, becoming the youngest player to win this season.

At 19 years and five months, Hataoka, who closed with a 63 to win by six strokes, became the 14th Japanese to claim victory on the U.S. women's tour including winners of the co-sanctioned Japan Classic.

She also eclipsed Mika Miyazato's previous record (22 years) set in 2012 to become the youngest Japanese LPGA Tour winner.

On Sunday, Hataoka made eight birdies in her second straight bogey-free round at Pinnacle Country Club to finish ahead of American Austin Ernst and eight shots clear of six players tied for third. She had just one bogey in three days.

"I managed to play my own game," Hataoka said. "I played alongside big names and that helped me a lot. I was really nervous this morning but I was able to focus once I started playing. Since I struggled last year I'm all the more happy," she said.

Hataoka was paired with ninth-ranked Minjee Lee of Australia and third-ranked Lexi Thompson of the United States in the last group. Lee and Thompson were part of the six-way tie for third.

Hataoka, who finished runner-up last month at the Kingsmill Championship, said she experienced frustration after a few near-misses this season but is pleased that she was finally rewarded with a trophy after playing aggressive golf from start to finish.

"I'm glad I was able to achieve my goal of posting a win within two years of my professional career," said Hataoka, who had four top-10 results this season before Sunday.

Hataoka is playing her second season on the LPGA Tour. She turned pro after capturing the Japan Women's Golf Open Championship as a 17-year-old in 2016, and was the first amateur to win a major tournament on the Japan LPGA tour.

In her debut season in the United States, she missed the cut in seven consecutive tournaments in June and July as she shouldered the burden of adjusting to a new environment. But this season, she has been accompanied on the tour by her mother who supports her as a personal chef.

The 54-hole competition was the final tune-up for next week's Women's PGA Championship, the third women's major event of the year.