[samurai007]

I may be wrong about this, but Japan didn't strike me as the kind of country where it's easy to do all that stuff. Some countries are more laid back about immigrants working here and there as the need and opportunity present themselves, buying and registering a car, etc. In America, Canada, Australia, much of Europe, no problem. But Japan is a bit tougher. They like foreign residents on work visas to come to Japan with a job and a Japanese guaranteer to vouch for them. Foreign residents are supposed to register their address with the local police. Buying a car requires keeping the shaken up to date and other things which can be extremely expensive (How are you going to just "leave your car" someplace outside Tokyo for the winter?).

I don't think they'd be too happy about someone coming to Japan, working here and there, sleeping in their car, etc. I'm not saying it's necessarily impossible, but Japan is just not that relaxed and permissive of foreigners who want to live and work there.