[mercedesjin]

I guess it depends on how you want to live there. It may be possible to do a simple exchange with a family, not necessarily get a job that might require a four-year degree. An adult can also go to Japan as a volunteer for a year or so, for which most programs don't require college education; and then of course, there are exchange students who are still studying and don't have their degree yet... There are a lot of options besides having to go to college.