Japan has everything for those who wish to explore mountainous regions or those who enjoy the ultra-modern districts. Climb to the top of Mt. Fuji, or visit the numerous attractions in Tokyo. Transportation is widely available and the most popular is travel by train. Experience the culture and history that Japan has to offer.
I spent a year there in the late 80's and had a great time. The only thing I will throw in is that if you come from an western back ground it takes a little time to adjust to the culture but the okinawan's are great people and it is a beautiful island. A lot of history also.