Well, now i would like to share my experience about how to study in Japan. There are a lot of my friends who are interested in Japan and want to study here, but they just don't have enough information, especially in my motherland. Even if you try to search how-to books, I don't think that it is really helpful. I might be new in Japan, but I'll try to share my experience in these 9 months.
First, what do you need to prepare before going here?
For example, if you want to go to undergraduate school and study in Japanese, you need (minimum) level 2 Japanese language proficiency test (N2) and the result of EJU, for job it is level 1 and other test (I will explain about JLPT later)
Just for your information, whatever your goal is, you need to enroll yourself in Japanese language school first. It is almost impossible for anyone to aim for their goal without going to Japanese language school even though they have N1 qualification. By going to Japanese language school, you don't only give yourself the time to adapt, you will also get used to listening Japanese conversation, writing essays, knowing Japanese customs, and many others.
For the education fee itself, I think it is probably cheaper than any other country, especially if you go to the national university. At least, you should consider your financial preparation for the language school and the first 3 months you got here. Even if you want to do part time jobs, you need at least a month to find some, because you need to wait the permission from the government.
You can try to browse the internet to get information, but I suggest you to go to Japanese education fair, because it more credible. You can meet face-to-face with the representation of the school, and ask many things. You can get many valuable information that you could not obtain from the internet.
Well, for now I think all of this the basic preparation to go study abroad in Japan. Hope this helpful for you ^^