[SSJup81]

The only way, imo, you could go to a Japanese University, is if you take up studies focusing on Japanese language/culture and then in your second or third year of university in your home country, participate in a study abroad program where you spend a semester studying in a foreign country, and in your case, you can choose Japan. This seems like the more logical route, especially since, from what I gather, you aren't completely fluent in the language of Japanese. This would be easier for you to do.