Radiation could cause some Tokyo areas to be evacuated

The hidden Fukushima disaster is still an escalating issue and it appears that radiation in some parts of Tokyo is now higher than in the Chernobyl exclusion zone. Yesterday, Al Jazeera pointed out:
Experts estimate the radiation leaked from Fukushima nuclear plant will exceed that of Chernobyl.
The need to evacuate parts of the sprawling capital of 35 million may have once seemed an incredible prospect but some experts say the possibility can no longer be ignored
Japan Times reports today, the Japanese government started discussing the potential need to evacuate Japan soon after the quake hit:
In the days immediately after the crisis began at the Fukushima No. 1 nuclear power plant, the government received a report saying 30 million residents in the Tokyo metropolitan area would have to be evacuated in a worst-case scenario, former Prime Minister Naoto Kan revealed in a recent interview.

“It was a crucial moment when I wasn’t sure whether Japan could continue to function as a state,” he said.

After the March 11 earthquake and tsunami crippled the plant, Kan instructed several entities to simulate a worst-case scenario. One of those assessments said everyone residing within 200 to 250 km of the plant — an zone that would encompass half to all of Tokyo and cut clear across Honshu to the Sea of Japan — would have to be evacuated.