Yes I agree with what everyone's said already.
Regarding your last points "how much does it cost? How do I apply?" I think you should start researching art schools (?) in Japan on Google for a start. I myself am studying in a university outside of my home country, and I found it by researching my options.
Try researching if any art schools in Japan have programs in English or for foreign students/exchange students, if your Japanese is not good (I also don't know what you mean by not good, could be A1, could be B2, that's a big difference, and also something you'll have to find out.)
Reaching out to art schools you find interesting over email or (if your Japanese allows it) phoning their international office/student counselling or the likes is a huge help in finding out the specifics about applying and what your options really are.