Five of the six matches were decided by a single score as Samoa claimed a second IRB Pacific Nations Cup title in three years.
Canada and USA will join Fiji, Tonga and Japan in an expanded IRB Pacific Nations Cup in 2013.
Fiji beat Tonga 29 - 17 in the final match of the Pacific Nations Cup in Lautoka with Samoa crowned champions last weekend.
Samoa has won the IRB Pacific Nations Cup 2012 in dramatic style with a thrilling 27-26 win over Japan in Tokyo.
If Samoa avoid defeat against Japan in their IRB Pacific Nations Cup match on Sunday, they will reclaim the PNC title.
All the coaches decide to make changes for their second matches in this year's IRB Pacific Nations Cup.
Samoa and Fiji got off to winning starts as the IRB Pacific Nations Cup kicked off on Tuesday at Nagoya’s Mizuho Park Rugby Ground.
Hosts Japan, Fiji, Samoa and Tonga are set for the IRB Pacific Nations Cup which kicks off in Nagoya on Tuesday.
Japan is set to host the PNC a year after the tournament was forced to move following the devastating earthquake and tsunami.
Fiji coach Inoke Male hopes to continue his country’s impressive form at the IRB Pacific Nations Cup in June, writes Ian Gilbert.