Last year we spent around 4 weeks in Japan, enjoying the massive diversity in food, culture and bushwalking across the country.
While in Tokyo we had planned on going to Mt Fuji for a day trip, but as the weather was rubbish we took the train down to Kamakura to do a couple of bushwalks instead. Both were short, but very rewarding. Thoroughly recommended if you've got a spare day.
You can find the write up, and some photos, over at my blog.
Enjoy!
Andrew.