A new atmosphere permeates Canada鈥檚 men鈥檚 rugby team these days 鈥� one of confidence.

Belief bubbled up when the squad downed world No. 20 Romania in Ottawa last month and it lingers as the 21st-ranked Canadians begin their Pacific Nations Cup quest in Vancouver on Sunday.

鈥淚 think (confidence) is probably something we鈥檝e lacked in years past due to a number of different factors,鈥� captain Lucas Rumball said Thursday. 鈥淏ut I think we need to start believing we鈥檙e a good team, start believing in ourselves, and see what can come with that.鈥�

Canada鈥檚 conviction could be put to the test Sunday when the squad takes on No. 14 Japan at B.C. Place to open its Pacific Nations Cup run.

The two sides have not met since 2016 when the Canadians dropped a 26-22 decision in Vancouver.

That game has stuck with Rumball over the years.

鈥淚 was young in my career at that time. I think it was my third or fourth cap,鈥� said the 29-year-old forward, who hails from Toronto. 鈥淪o I was still kind of living in the moment and a little overwhelmed by things. But I remember a tight game.鈥�

Eight years later, Japan remains a tough opponent, he added.

鈥淭hey stick to their game plan really well, they work very hard,鈥� Rumball said. 鈥淪o you can never take a moment off.鈥�

Japan鈥檚 an organized team, and Canada will need to impose its own style of play to control the game, said vice-captain Ben LeSage.

鈥淭hey鈥檙e probably one of the fittest teams in the world. They just try and challenge other teams in terms of ball and play time, all those sorts of things,鈥� he said. 鈥淚 think when you make mistakes against them, they鈥檙e going to capitalize and they probably don鈥檛 make as many mistakes as other teams do.鈥�

Sunday鈥檚 game will kick off a busy stretch for the Canadians.

Afterwards, the team will head to Carson, Cali., where they鈥檒l continue the Pacific Nations Cup in a battle with the 19th-ranked United States on Aug. 31.

Canada and the U.S. will then join Japan, No. 10 Fiji, No. 13 Samoa and No. 16 Tonga in Tokyo for the tournament鈥檚 semifinals and fifth-place playoff on Sept. 14 and 15. The final and third-place playoff are set for Sept. 21 in Osaka.

Having a packed international schedule is a nice change of pace for the Canadians, said LeSage, who won a Major League Rugby championship title with the New England Free Jacks earlier this month.

鈥淚 think first and foremost, it鈥檚 just exciting for us to have rugby and be in a tournament,鈥� he said. 鈥淪ince the (2019) World Cup, there鈥檚 been sort of test matches few and far between. So just to have this recurring tournament where we鈥檙e playing some of the best rugby countries in the world, it鈥檚 exciting to be involved with that and have Canada in the mix.鈥�

The Pacific Nations Cup allows the squad to 鈥済et into a bit of a rhythm,鈥� he added, and that鈥檚 big for a team that mixes veterans like LeSage and Rumball with up-and-coming athletes 鈥� especially as Canada strives to earn a spot at the 2027 Rugby World Cup in Australia.

鈥淥bviously we want to win the Pacific Nations Cup and win every test match we play. But with World Cup qualification being next year, there鈥檚 not a lot of pressure this year,鈥� LeSage said.

鈥淲e鈥檝e got a young team. A lot of guys, (Sunday) will be the first time they play in front of a crowd this big. We鈥檙e staying at world-class hotels, using world-class facilities. It鈥檚 a pretty amazing opportunity just to be involved. So I think you can take lessons this year and build confidence going into next year.鈥�