I went with my sister and a friend for 11 days to Japan. We stayed in Tokyo for about 3 days and then hit the surrounding areas. Hiroshima, Kyoto (where we saw a sumo tournament), and a couple other spots. The city of Tokyo was great, but it was good to get out to the more rural parts of the country and see some the temples. more to come I'm sure.
In terms of price, we stayed at a hostel and bought bullet train tickets in the US before we left from the STA. (highly suggested move)