Some clarification: Fukushima is a prefecture covering 14,000 square kilometers, with about 2 million residents. The town of Ōkuma, where the Fukushima Daiichi power station is located, had a population of 11,000 and has been evacuated to a radius of 10 km. That's a very conservative exclusion zone that reflects a slightly increased lifetime risk of certain cancers; the area that's actually "uninhabitable" is extremely small. No need to blow things out of proportion.