Do you have to have a lot of money, make a lot of money, or have a really good job to naturalize?
You don't have to be wealthy in order to naturalize. The primary purpose of the lengthy paperwork where you outlay your assets and employer as well as your monthly expenses is basically to determine that the odds of you becoming a candidate for welfare payments anytime in your future are low. In the words of some legal sites, the litmus test is 「日本国に迷惑をかけずに生活できること」 { "Nippon-koku ni meiwaku o kakezu ni seikatsu dekiru koto" } ("can live without being a burden to Japan") Filling out the paperwork on your income and expenses, in fact, feels a lot like completing a major credit or loan application in Japan. They're concerned not just with how much money you're pulling in, but how you're spending it, how stable your employment and career is, and whether or not you have enough skills (i.e. Japanese language) so that if you were to ever lose your employment, you stand a chance of getting another job in Japan. Thus, having a well paying job with a l...