Nearly a tenth of Japan contaminated
Mark Willacy, North Asia correspondent
Japan's Science Ministry says nearly 10 per cent of the country's land has been contaminated by radiation from the crippled Fukushima nuclear plant.
It says more than 30,000km², or eight per cent of the country's land area, has been blanketed by radioactive caesium.
The Ministry says most of the contamination was caused by four large plumes of radiation spewed out by the Fukushima nuclear plant in the first two weeks after meltdowns after the March earthquake and tsunami.
The Japanese Government says some of the radioactive material fell with rain and snow, leaving the affected areas with accumulations of more than 10,000 becquerels of caesium per square metre.