Japan's Nasa Hataoka maintained her lead at the LPGA's Marathon Classic on Friday, carding a two-under-par round second round 69 to move to 12-under - two shots clear of Mina Harigae in second place. Hataoka, who shot a 61 in the opening round, rolled in four consecutive birdies from the 14th hole to hold on her place at the top of the leaderboard. Americans Alison Lee and Elizabeth Szokol are tied for place on nine-under - both players carding second-round 66s.