Japan's Yuka Saso produced a blistering run of birdies to grab the first-round lead at the CPKC Women's Open with a six-under-par round of 66 at Shaughnessy Golf and Country Club in Vancouver on Thursday.Saso, starting on the back nine, reached the turn on even par but the 22-year-old, who won the US Women's Open in 2021, came alive with four straight birdies and added two more to ensure a one-stroke lead over Sweden's Linn Grant.