Japan's Nasa Hataoka matched a course-record 8-under-par 64 in the first round of the CP Women's Open on Thursday, opening the 72-hole event in Canada in a three-way tie for first place.
Hataoka carded nine birdies against a lone bogey for a share of the course record at Wascana Country Club with Thailand's Ariya Jutanugarn, who also had nine birdies and a bogey, and Colombia's Mariajo Uribe, who had eight birdies in a bogey-free round.
"I was able to shoot aggressively and convert my chances," Hataoka said. "(My swing) wasn't very smooth before the tournament but once it got under way, I had a better rhythm so it gives me confidence."
Denmark's Nanna Koerstz Madsen and American Angel Yin are one shot behind the leading trio, while seven golfers, including three-time CP Women's Open winner Lydia Ko of New Zealand, are tied for sixth at 6-under.
Starting on the back nine, Hataoka made two straight birdies in Nos. 10 and 11 before her only blemish on the card on the par-5 17th. She birdied the next hole to recover her momentum, and then sank four more after the turn to finish strongly.
"I can't bogey (tomorrow)," Hataoka said. "But even if I do, my goal is to limit it to one per day."
The 19-year-old rookie is looking for her second win on the LPGA tour, following her maiden victory in June at the Walmart NW Arkansas Championship.
Among other Japanese at the tournament, Ayako Uehara and Harukyo Nomura are both six shots off the pace with 70s, while Sakura Yokomine is a shot behind at 1-under 71.