[Kanji_The_Wanderer]

I don't think there is any "special" way to get money to travel to Japan. Unless you hit the lottery, or turn into a foreign exchange student, and travel there to learn. (I think that you'd get a discount or something by doing that)
but other then that, all you can really do is work your butt off and save cash, and not spend it. Put it in the bank, or hide it somewhere!