It’s becoming impossible to have clean food in Japan.
One of the major Japanese supermarket chains “Aeon” has given up selling radiation-free food.
On 11/8/2011, Aeon announced that they set their original safety limit, which is 50Bq/Kg. [Link]
Government’s safety limit is 100 Bq/kg, so it’s supposed to be double safe but still it’s not 0 Bq/Kg.
Aeon publishes the result of radiation measurement, but the sample covers only a few percentage of all.
Aeon is building their back-up headquarters in Aichi, mid-Japan. (cf. Largest supermarket chain and Imperial family move their back up in western Japan)