Commenter Jeremy at "Fukushima Update 14 April 2011" sent me via e-mail a link to the below map. And some supporting evidence. Links below for a larger version of the map and the supporting evidence.
A larger version of the map.
Why there is an exclusion zone around the other Fukushima plant.
The situation now is such that Tokyo is not in serious danger. Come the monsoons in June - August when the winds change the situation could change. In fact Japan could be cut in half by the radiation carried by those winds.
Cross Posted at Classical Values