I hope to get a chance too, i'll go there one day. You can go there alone, even at your age. I'm going to the US alone at age 15 even i had never went out of town alone.
I went to Japan last July for 10 days in Yokohama. I went to a school there for 4 days and made some friends there. I plan to spend a year in Japan next year, after I leave school...