Nasa Hataoka fired a 7-under 64 on Saturday to build a six-shot lead after three rounds of the Marathon LPGA Classic at Sylvania, Ohio.
Hataoka carded eight birdies and one bogey during the solid round that gave her a 54-hole course record at 19-under 194 at Highland Meadows Golf Club.
Elizabeth Szokol and Mina Harigae are tied for second. Szokol shot 67 and Harigae posted a 68.