Nacewa, who can play in the centre or across the back three, will link up with the Irish provincial outfit in time for next season.

The 25-year-old won one cap for Fiji at the 2003 World Cup, which subsequently rendered him ineligible to play for New Zealand, the country of his birth.

Leinster coach Michael Cheika said: “Isa is a top-class attacking player who is a threat as an out and out try-scorer, as well as a playmaker.

“He will add great depth to our backline for next year and he will also increase our kicking options.”