You can easily spend all day poking around Kamakura. We hiked it and had a great day visiting various shrines and the of course the Buddha!

The scale of the area isnt all the great so if you like to walk you can go from the train station up to the shrine area, down to the buddha, get lunch at one of the many restaurants down the way, walk to the beach, head back into town do a little shopping and then take the train back while you rest your feet...

Been there done that