hmm Exchange could be good. but i don't know if here in POLAND are Universities that are making exchanges with Japan
It would me much easier.
And that what you said about schools. I know, that school isn't most important, but in good school they will make you learning more :P
And about activities, I swim very often, go on extra match and English lessons, on gym, and I'm learning extra in my house Japanese and Programming. Now I want also to join Aikido school, but in 3 months I will take Drive licence test, so I'm really busy. Are this activities good ?
Maybe not so educative but those all are additional.
Maybe we will met somewhere, sometime in Japan