Skip Binia Feltscher and her team - third Irene Schori, second Franziska Kaufmann, lead Christine Urech and alternate Carol Howald - triumphed in a match which saw the advantage bounce back and forth.

Their victory at the Canadian venue backed up successes for the Swiss in Sapporo last year and Saint John in 2014.

Feltscher's team opened the scoring in the second end when the skip drew her last stone into the house for a single point, with Japan's skip Satsuki Fujisawa blanking the third before levelling in the fourth.

In the fifth, Feltscher attempted a delicate tap-up for two points but nudged out one of her own stones and had to settle for one.

That allowed Japan, the first Asian country to ever reach the final, to edge in front 3-2 with two points in the sixth.

The Swiss had a chance for four points in the seventh but settled for a still useful three as Feltscher's shooting stone rolled out of the house.

Their 5-3 lead was evaporated in the eighth when Fujisawa played a hit-and-stay for three which put the Japanese 6-5 up.

Feltscher, an Olympic silver medallist from Turin 2006, then produced a perfectly-judged draw in the ninth end to score two more points and re-take the lead again, and there was no way back for Japan.

In the 10th end, Fujisawa was heavy with her last stone and the Swiss stole two to seal the world title.

"We are so excited," said Schori.

"It's unbelievable, it's so great."

Fujisawa added: "We had a good chance to take the gold there but we didn't make it, so that's a little difficult.

"We really know that we were fortunate to make it to the final and we'll just do our best to try to get back here next year."

In the bronze medal match, Russia upset hosts Canada with a 9-8 success.