Thanks alot again Lordjeebus, for the etiquette advice, and the food advice. I have actually been doing some research myself and I stumbled apon this messageboard, called "Gaijin in Japan".
http://pub26.ezboard.com/brealdiscussionboard, and after reading it for a while I heard from many posts that Japanese people discriminate against foreigners alot, and that they don't treat them very well, and look down apon them. Does discrimination happen frequently, or is it just people posting who had one or two bad experiences?