|Mm, nothing sounds better as a light snack than dried, whole fish.|
But there is something even more bewildering and disconcerting that you very rarely hear about: reverse culture shock. It happens to people who spend a long period of time in another culture, experiencing all those jarring moments of regular culture shock and slowly becoming accustomed to them. Eventually, you become so used to your new culture that your native culture starts feeling foreign to you.
For me, it always starts at Narita as I'm waiting to board the plane home with all the other American ex-pats and tourists.