[WingsToDiscovery]

Even if you were to come to Japan straight away for college, I'm probably sure any of the universities you would be able to get into (non-Japanese) wouldn't even have your degree major. Most people (like myself) who come to Japan to study are here to do something affiliated with actually being in Japan, such as international relations/business, asian studies, Japanese, etc. Even if you could find a school with your major, you'd then also need to ensure some kind of fluency in the language over the course of your stay due to the fact that you're getting into a fairly complex subject.

You don't even need to go to a language school unless you'd plan on becoming fluent enough first to join a Japanese university. There are several universities in Japan that accept non Japanese students (with no Japanese language ability). These schools should issue you a visa, and all that is is a piece of paper in your passport saying that you're allowed to be in the country as a student. If the school you apply to sponsors visas, they will have the according paperwork for you to fill out as you're applying to the school.