Kim Seung-hyuk fired a six-under-par 66 on Thursday for a two-stroke lead on the opening day of the SK Telecom Open
The 28-year-old recovered from a triple bogey that had earlier seen him slice out of bounds, before compounding the error with a three putt.
He made amends when he holed 50-footer birdie on the last hole under windy conditions.
Kim made four birdies on front nine and four more in the first five holes of his back nine before the triple bogey at the sixth put a blot on his sheet.
Lee Tae-hee (68) was occupying second spot while Kim Kyun-tae was among seven others at two under.
Defending champion Matthew Griffin and three-time winner K.J. Choi played together in windy conditions to settle for matching 73s.