19 March 2011 -- However, travellers should avoid travel to the areas most affected by the earthquake and tsunami because of disruptions to essential services, such as transport and electric power, and the ongoing disaster relief activities. WHO is providing answers like this to the general public's frequently asked questions concerning exposure, food, shelter and individual protective measures on the radiation incident in Japan.
As we know..we still do not allow to visit Japan..Please beware!!
Source: http://www.who.int/en/
SAVE OUR ENVIRONMENT!!