The Differ Cup was a biennial, cross-promotional professional wrestling tournament in Japan, contested among several teams of junior heavyweight tag teams, each typically representing a particular promotion. It was first held in 2003, and was then held in 2005 and finally in 2007. Since the founding of the Global Professional Wrestling Alliance in 2006, the Differ Cup had been considered a production of the GPWA, with several GPWA member promotions participating.