Debtor outside the country

Hello Atty. I would like to seek advice regarding the debtor who is currently in South Korea. I lent money to him amounting to 4M in pesos since 2006. He signed a notarized acknowledgement of debt in October 2008 at the Philippine Embassy in Seoul. I do have the documents intact. He is very good on keeping promises but nothing happened since then. I tried to wait for it but right now since I badly need the money I decided to do something. At the time of this writing, it is almost 6 years passed. My question is can I still file a case against him because some friends of mine mentioned about statute of limitation? or shall I hire a collection agency? His family members are living in Manila. He has a brand new car, a house and nice business. By the way, I am not the only one who is a victim here. He also borrowed money from my friends. It is also worth millions. Please advise what to do. Your prompt response is highly appreciated. Maraming Salamat po.

Hire a lawyer quick.

I am also out of the country. Do I need to go home to file a case or the lawyer will do on my stead? Also, how much more time do I have to file a case against this estafador? I would like to know the no of years. Thank you.