I think you should just try out Japan for one year as a starter. You don't really know anything about the country if you haven't lived there before. To think now that you want to move to Japan and live there the rest of your live is wrong, i think, that's my opinion. I think you should start small...
Like working as an Au pair in an Japanese family for instance. Or you can study in Japan, one year.. Or work at a manga cafe in Akihabara and wear those kawaii maid costumes
yeah, there are many bars and such and such that want foreigners.