[rilakkuma]

I was wondering if anyone could give me some info on using the Japan postal service? I plan on sending some boxes (small, not too heavy) back to America and I want to know roughly how much it might cost. Also, do I need to go to the post office and buy boxes and take them home to wrap up my packages? Or can I box up my items at the post office? (Not sure what the proper etiquette is..)
Anyways.. sorry if any of these questions are stupid, but I have had some bad experiences at post offices in America and I'm assuming it will be harder to mail things here since I am not fluent in Japanese.
Thanks!