Dude, if you can't afford to go to college, how do you expect to be able to afford to live in Japan?
There's such a thing as student loans, and state-run or community colleges. Tuition is $5-6k a year at a state university, which federal student loans will pretty much cover. If your parents' income is low enough you can even get grants that you don't have to pay back (not the case for me unfortunately). If you wait until you're 24, you don't even have to claim your parents' income and you can get all these grants.
You can then work while you go to school, to pay rent ($300 a month is about right for a college student sharing an apartment) and eat.
Basically, you *can* afford to go to college. You just don't want to.
PS, I smell a troll?