The 2015 title was contested between the Tier 2 nations of Canada, Fiji, Japan, Samoa, Tonga and the United States.

Due to the 2015 Rugby World Cup, the tournament took place in July and August with all teams having access to overseas players.

Following the three rounds of cross pool matches, the six teams were seeded one through to six and played in three final play-offs to determine who finishes first to sixth.

Nanyak Dala and Jake Ilnicki were added to the squad ahead of the United States final match.

On 12 July 2015, Head Coach John McKee announced a 31-man squad for the 2015 World Rugby Pacific Nations Cup.

On the 22 June, head coach Mana Otai announced their 31-man squad for the 2015 World Rugby Pacific Nations Cup in Fiji and Canada.

[11] Inaki Basauri, John Cullen, Tom Coolican, Lemoto Filikitonga, Ben Landry, Chad London, Samu Manoa, Tim Maupin, Ronnie McLean, Louis Mulholland, Zachary Pangelinan, Robbie Shaw, Mike Shepherd, Tim Stanfill, Kyle Sumsion, Matt Trouville, Tai Tuisamoa and Nicholas Wallace were all in the 2015 Rugby World Cup training squad, but was not selected for the final PNC squad.