Japan Trip

I will be travelling to Kamakura, Japan for a conference on Men's Health and Aging. Wondering if it is safe there. Worried about the radiation there more than the the earthquake. I guess a short stay there of 4 days should be ok. Guess will have to be careful about the food there and try stay indoors as much as possible. Any comments out there? If anyone has recently travelled to Tokyo recently, please share your experience.