Reply #4: "Millions of acres" might be a bit of an exaggeration

[Art_from_Ark]

since one million acres is 1560 square miles, or little less than 30% of the land area of Fukushima Prefecture. The amount of land in the 20km exclusion zone is about 225 square miles, with another 275 square miles or so outside of that zone that has been evacuated or is scheduled for evacuation. The winds blowing inland are a concern, no doubt, but it remains to be seen just how much land will be uninhabitable over the long term.

Here are radiation readings taken about an hour ago (that is, at 14:00 on June 7 local time) at various points around Fukushima Prefecture.

http://www.pref.fukushima.jp/j/sokuteichi2013.pdf