The IRB Pacific Nations Cup is an International round-robin competition comprising the test teams of Fiji, Samoa, Tonga and Japan.  The Junior All Blacks - who in 2008 were replaced by the New Zealand Maori - and Australia A who participated in 2007 and 2008 have withdrawn from the competition.  

Like the Pacific Rugby Cup, the IRB Pacific Nations Cup is a key component of the IRB’s £48m million Strategic Investment initiative and is designed to provide the Pacific Island Nations and Japan with regular high level competition.

The tournament structure for the 2011 IRB Pacific Nations Cup has been condensed with the three rounds being played over two weeks with the opening match, Japan v Samoa, being played in Tokyo on 2 July and the remainder of the Tournament being played in Fiji between 2 and 13 July 2011.  The entire Tournament will be played within the IRB's Southern Hemisphere Window enabling Unions to secure the services of their overseas-based players in preparation for RWC 2011.

2006 Champions: Junior All Blacks
2007 Champions: Junior All Blacks
2008 Champions: New Zealand Maori
2009 Champions: Junior All Blacks
2010 Champions: Samoa