The Canadians only hope was for a low scoring draw, which would have given them the title, but favourable conditions saw the Fijians run in four tries to claim the title.
Qera was a proud man as he told irb.com after the game:
"It's a touching achievement as it's been a big year for Fiji rugby," said Qera in reference to the Fiji Rugby Union's centenary year.
"We lost control in the first half but came together in the second half and scored the maximum points we needed."
Tonga got off to the perfect start with Thomas Palu knocking over a penalty in the second minute and Fraser Anderson touching down in the fifth following a good run by Latu.
Palu missed the conversion but he was on target five minutes later with a second penalty as Tonga went 11-0 up.
Fiji were struggling to make any inroads, but a moment of individual brilliance changed things with Sireli Bobo using his pace to go over from halfway in the 22nd minute. Seremaia Bai added the extras as Fiji closed the gap to 11-7.
Fiji made the Tongans pay for Palu missing two kicks at goal, when a good break in the 33rd minute by Saula Radidi was finished off by Napolioni Nalaga, with Bai again on target with the conversion.
Tonga hit back though right on the half time hooter as Palu finally got his radar working and knocked over his third penalty as the teams went into the break all square at 14-14.
The start of the second saw Palu miss his third kick at goal and Fiji blow two try scoring opportunities, with Vili Veikoso knocked into touch just short of the line and Nalaga knocking on as he dived over.
Bai, however, made no mistake when Tonga were penalised in the 55th minute, the fly half knocking over a penalty from 38 metres out.
The match needed a spark and it duly arrived in the 62nd minute when a turnover by Api Naikatini close to his own line led to a 95-metre move downfield involving both forwards and backs that was finished off in spectacular fashion by Nemani Nadolo. Bai turned the five points into seven with the conversion as Fiji led 24-14.
Nalaga grabbed the bonus point try in the 68th minute following another enthralling passage of play, and with Bai slotting the conversion and a penalty in the 72nd minute, Tonga needed three converted tries to win.
They managed one through Latu with Siale Fahiua adding the conversion, but it was too little too late.
Content courtesy of irb.com