Well its a good thing you read up some brief stuff before hand. Even if you're 13, still read all this. it would prove useful to you when you're older and plan to go to Japan.
Also if ya wanna know about the national anthem, and other stuff check em. Best to know your stuff to survive XD
All i can say is
"to enter paradise, you pay the price"
http://www.japanlinked.com/
http://thejapanfaq.com/