Hi
I was at a Japanese school for around two years, you can look on my blog for pics, though I think your experience would be different depending where you go, what type of program it is ,etc.
Maybe you could tell us more about the program itself, or which ones you are considering because there are several organizations out there, such as
Rotary Exchange,
YFU,
CIEE,
AFS,
AYUSA etc. Look through them if you haven't already