What Mrog says is right about being a foreigner in Asia. You really need a good social network there if you want to thrive. I already have connections with church communities in Japan, so I would have a place to belong if I moved there. If you have no asian lineage, you will have to get used to people staring at you everywhere you go, and high school girls shouting hello to you randomly and asking for a picture with the gaijin. Professionally it will be harder to get people to take you seriously, but working in the design field should be much better than working there as an english teacher.