While Vainikolo, from Ha'alalo in Tonga, has no family in Northland, he said he had old friends and teammates here, including Rene Ranger, and current Taniwha coach Adriaan Ferris - Vainikolo's old club coach at Wellsford.
After playing three seasons with Northland, Vainikolo transferred to Otago, but following his exclusion from the Highlanders main squad for the 2011 Super 15 season, he took up a contract with Magners League side Connacht, in Galway, Ireland.
"I had just gone over to Connacht and had only been there four weeks when I got the call up. I was stoked ... I will head back to Ireland for the rest of the season after the World Cup," Vainikolo said.
Playing arguably their toughest match of the pool on Friday had prepared Tonga nicely for the rest of their games, he added.
"I don't think we are disadvantaged because of the quick turnaround at all heading into this match against Canada. While it's their first match, we had a good physical hit out, with lots of contact, which has warmed us up."
Tomorrow's match is one the Ikale Tahi are targeting to win although the team do not know what to expect from Canada, Vainikolo admitted.
"They are a bit of an unknown side for us really having not seen them play yet, but we will respect them and we can't take them lightly," he said.
So far, the support for Tonga had been staggering, with Auckland's Tongan community turning out in their masses, which had lifted the Ikale Tahi on Friday night to produce a performance the team were very proud of and gained a lot of confidence from.
"It's pretty amazing ... we had a lot of support in Tonga when we left but not like when we arrived here."
The team was interested in finding out what support Northland Tongans would bring to the two matches at Whangarei's Toll Stadium, tomorrow and next Wednesday against Japan, he said. Kick off for tomorrow's match is at 5pm.