Try Yokohama for a day. It's roughly a 90 minute train ride to central station. It's a non obvious place to look, but let me link you to the Sheraton Yokohama thread. It's right by the train station, so the description of where to go sightseeing is relevant for you coming in by train.

Kamakura:

http://www.flyertalk.com/forum/starw...ml#post3434883
and
http://www.flyertalk.com/forum/3435829-post13.html
and
http://www.flyertalk.com/forum/6000323-post42.html

Sankeien Garden
http://www.flyertalk.com/forum/6001681-post44.html

I gave directions to the sushi restaurant with sushi on the moving belt in the top floor of the department store at the train station. You take what you want off the belt, no local language needed.

Also look at the wiki for this year's Japan Do:

http://www.flyertalk.com/forum/commu...31-2013-a.html

I highly recommend the Sumida River Water Bus and Hamarikyu Gardens
combo. Go to the gardens, then take the boat down the river. When you get off the boat, there are signs to a big temple.

http://www.flyertalk.com/forum/20295366-post509.html

I hope you find some things that you enjoy doing and get your trip back on track.