The South Pacific Forum (SPF) has consolidated regional cooperation as an effective mean to increase regional security since its formation in 1971. In the 1990s, SPF started to diversify regional cooperation by extending its commitment to other forms of regionalism. One of the salient cases is the commitment in Asia-Pacific regionalism, notably Asia-Pacific Economic Cooperation (APEC) which was created in 1989. This paper investigates the reasons and nature of the SPF which is going to get involved in the macroregional frameworks of the Asia-Pacific. As mentiond above, SPF has played a significant role in increasing regional security. In the economic domain, the coordination of aid and the facilitation of negotiations on trade preferences a...