If you want to learn Japanese in Japan, we are able to help you. We have different corses you can attend, from 1 month to 2 years. You can choose between general language courses or for your preparation to the university. We can offer 3 different schools in Japan, one in Nagano and two in Tokyo.
In order to participate, it requires that you have graduated high-school / Gymnasiet or have graduated minimum 12 years of school. 

Read more about Language School in Japan here