South Korean Lee Ji Hee zeroed in on her third title of the season when she produced a 3-under-par 69 Saturday, extending her overnight lead to four strokes heading into the final round of the Suntory Ladies Open.

Two shots clear at the start of play, the 24-year-old from Seoul rolled in five birdies against two bogeys at the Japan Memorial Golf Club to put further daylight between herself and her nearest rivals.