[godwine]

7 days?

I will do this

1 day - Kamakura
1 day - Nikko
1 day - Yokohama, MinatoMirai, Chinatown..
1 day - hakone

3 days in Tokyo, cover the following area

- Odaiba
- Akihabara
- Shinjuku, Shibuya, Harajuku (Include Yoyogi and Meiji Jingu), half a day
- Ginza
- Asakusa
- Mitaka (If you want to visit the Ghibli museum)

3 days should be more than enough to do all these... also, the 1 day in Kamakura, may not be a full day activity, so you may be able to cover some of these in the afternoon of your Kamakura day