I'd say take the chance while you still can
the world economy sucks; but because of it the yen is looking stronger then a lot of western currencies; i'd say it's more reason to go now; if anything you'll be rich by the time you get back
when you're there; just try not to think of yourself as a "poor student" it won't actually help with your spending or your enjoyment; just spend what you need to, and save anything else; it will be worth it