Oh, so basically the same thing I intend to do? Well, rather than a language school or just straight up J-uni, what you could do is apply to an international university. A friend of mine has done this and it basically works out like. You get the Japanese courses taught by an instructor which is in full Japanese, but your other courses are more in English. From what he tells me, the idea is to let you get used to living in (and daily life in) Japan before you move onto a full Japanese University. At the international U, you do things like order your meals in Japanese and most daily common interactions are in Japanese, but the course material is in English for some courses. So yeah, that's been my plan so far. Does this sound good to you as well?
He tells me I should go to one near Tokyo, but personally I think I'd prefer somewhere a little less known. I kind of like a little less city life, in a way. I'd just hope that wherever I move has good fresh Fish, cause I'd like to cook with it.