If you're selling a simple service/product that solves a technological problem and it doesn't really need customer support then it could be relatively simple.
Now if you are going in the lifestyle direction or your service is customer support heavy then you're in for a mess.
And Asia is a big place itself, I guess you mean south east Asian countries like South Korea, Japan, Singapore, HK, China, Taiwan etc. But those are already disconnected enough.
There is very very little overlap in web infrastructure between those countries. Even HK, China and Taiwan are completely different in those matters. You might be doing great in HK without getting a single customer from China or Taiwan. So it's very hard to focus on a single market.
As you're saying you find it hard to reach them then I guess your product is not easy to adapt to foreign markets. Unless you're already doing great in the US don't waste your time.
What makes you think Asia is a good idea? Maybe we could help you more if we knew what're you're after. There's definitely many cases in which entering Asian market would be a terrific idea.