If you are of free spirit, don’t want to follow the thousands of tourists in the urban centers. Want to get to know the specials of japan individually, in Kyushu there is a lot of it. Then may be such a round trip would be something for you. This could of course be adapted to your own individual interests. Just have a look. Not to worry about the language, a little english will do. Have a look:
A long trip around Kyushu (start here)
My Kyushu 