Josua "Josh" Koroibulu is a Fijian professional rugby league footballer who has played for the Milton-Ulladulla Bulldogs, the Guyra Super Spuds and the (of Group 19 Rugby League, in Armidale, New South Wales). He was selected for Fiji squad in the 2008 Rugby League World Cup, but he did not play in any of Fiji's four matches.