Miyu Yamashita did not so much win the CPKC Women’s Open as remove the rest of the field from the conversation entirely. She opened with a course-record 62 at Royal Mayfair Golf Club on Thursday, never surrendered the lead for a single hole across the four days that followed, and closed out a wire-to-wire victory at 23-under 257, nine clear of Yuri Yoshida in second. The winning total ties the LPGA Tour’s all-time 72-hole scoring record, a mark Sei Young Kim set at the 2018 Thornberry Creek LPGA Classic, and the nine-shot margin broke the tournament record by a wide berth, eclipsing Jin Young Ko’s winning score of 262 from 2019.
There is a version of this kind of week that gets boring to watch by Saturday afternoon, the outcome settled so far in advance that Sunday becomes a procession. This was not quite that. Yamashita’s scores actually crept upward as the week went on, 62 giving way to 64, then 65, then a closing 66, which meant the margin was less about a hot final round than about a lead built so early and so large that the rest of the leaderboard was playing for second place by Friday evening. That is a different kind of pressure to carry than protecting a one-shot cushion down the stretch, and Yamashita carried it without a visible wobble.
A course that had no answer for her
Royal Mayfair is a Stanley Thompson design that dates back to the 1920s, tightened by tree-lined corridors along the North Saskatchewan River valley, the kind of course that is meant to punish anything loose off the tee. Yamashita’s opening 62 set the tone by making that threat look theoretical. She played the rest of the week from so far in front that Royal Mayfair’s defences barely got to test her decision-making under duress, which is really the whole point of a wire-to-wire win of this size. The field spent four days trying to find a route back into contention and never found one, with Yoshida’s solo second the best anyone could manage against a total that has only been matched once in tour history.
Four wins, four countries
What makes this victory more than a one-week outlier is where it sits in Yamashita’s season. She won the Women’s British Open at Royal Porthcawl in Wales last year for her first major, followed that with the Maybank Championship in Malaysia, then took the Meijer LPGA Classic in Michigan back in June. Edmonton makes it four LPGA Tour titles in four different countries, and by the tour’s own count she reached that number faster than any Japanese player in history, doing it in just 42 starts. That is not a career built on one hot putting week. It is a player who travels well, adapts to different conditions and grinds, and keeps finding a way to close.
A big week for a good cause
The tournament’s charitable arm had a strong week of its own. Organisers announced a record 4.95 million dollars raised for heart health initiatives across Alberta, the kind of number that tends to get buried under a leaderboard story but is worth a line of its own, particularly at a Canadian event that has built its identity around exactly that cause.
What it means heading into the stretch
The CPKC Women’s Open closed out a stretch of LPGA scheduling that has been unusually crowded with storylines, from Solheim Cup qualifying deadlines to a run of strong individual form across the leaderboard, and Yamashita’s week will be the one people remember from it. A 23-under total that ties a record set only once before, delivered without a single round below the field’s best on any given day, is the sort of performance that reads a little differently with distance. It is not just a big number. It is a signal that when Yamashita finds her week, nobody currently on tour has an answer for it, and that is worth watching closely as the LPGA season moves toward its own finale.