Mikaël Kingsbury marked his 100th International Ski Federation (FIS) Freestyle Ski World Cup appearance, with victory in the opening moguls event of the 2019-2020 season in Ruka.
The Canadian claimed Olympic gold in Pyeongchang last year and is seeking a ninth successive overall moguls title this season.
He made the perfect start in the Finnish resort, with a score of 90.80 taking him to the top of the leaderboard.
Ikuma Horishima was his closest rival, more than three points behind, as the Japanese claimed second place on 87.39 points.
Sweden's Walter Wallberg completed the podium, scoring 86.83, with Kazakhstan's Dmitriy Reikherd placing fourth on 79.41 points.
Perrine Laffont from France won the 2018 overall women's title and made the perfect start to the new season in Ruka.
The 21-year-old, like Kingsbury, claimed the Olympic title in Pyeongchang last year, and has four world medals in her growing collection.
She topped the podium in Finland with a score of 82.72.
There was a second Japanese silver, as Anri Kawamuri was the best of the rest behind Laffont.
Kawamuri scored 81.26 points in second, as Australia's Britteny Cox collected bronze with 78.29.