Munster have announced that James Coughlan is leaving the province at the end of June.
Coughlan, who had a contract with the province until June 2015, has asked to be released early release from the contract.
The province said they supported his decision to move abroad.
Coughlan said: "This was a difficult decision for me to make. I was presented with an opportunity that I had to take for myself and my young family as we plan for our future. I want to thank Garrett (Fitzgerald) and the Professional Game Committee for their support in facilitating my request to leave the province.
"Playing for Munster has been a dream come through. I never thought I would have achieved what I have and the whole experience has been life-changing.
"I am so thankful for my career and the incredible support I have received along the way. It is with the heaviest of hearts that I am leaving but an amazing challenge awaits me and my family.
"My wife Katri and children Finn, Aoibhinn and Elsie have been an incredible support and we are really looking forward to the next chapter of our lives.
"I want to wish the Munster Rugby squad, staff and supporters all the success for the future, and my family and I will always be cheering you on."
Munster Rugby CEO Garrett Fitzgerald said: "James is an honest and committed player with a terrific work-rate, and he has delivered over and over again for Munster.
"He is an example to all aspiring players - dedication and hard-work at club level secured his fate as he broke into professional rugby and excelled as a player, something we are extremely thankful for.
"It is hard for us to release such a valuable asset but we fully support James and his family and wish them all the best with their move."