Rupeni Caucaunibuca (, born 5 June 1980) is a Fijian rugby union footballer. He plays wing for French club side Agen and the Fiji national team, and formerly played for New Zealand-based teams such as Super Rugby's Blues and provincial side Northland. He is also known as 'Caucau' (). The Fiji Rugby Union banned him for one year, ruling him out of the 2005 autumn tour of Europe and the 2006 South Pacific Tri-Nations series. He is also honorary chairman of Rupeni RFU touch rugby team.