[Kanji_The_Wanderer]

As a tourist I heard that you can only spend 3 months at a time in Japan, then you have to leave and pay to go back if you want to stay again...

It is not that easy to move there, you can't just pack your bags and decide to stay in the country. Since Japan is an extremely small island they are very conscious of who is there, you'll have to do a lot of paper work and you'll need to go through school to get a job. It's A LOT of hard work, but if you are determined you will do it.

PS. you'll need a bachelor's degree to get a well paying job.