Originally Posted by
hailstorm
Beef exceeding those limits has been sold throughout much of Japan, partly because Fukushima cows have been shipped to other prefectures, and partly because radioactive feed from Fukushima has been shipped throughout the country and eaten by cows in other prefectures.
I think you're overstating the issue. Some beef did slip into commerce in excess of the limits, was detected, was pulled from the market, and wasn't all
that radioactive to begin with. See, for instance,
this FT article, particularly the following factoid:
The effect of eating a kilogramme of beef with the maximum limit allowed for caesium in Japan is the equivalent to one-50th of an annual dosage from naturally occurring radioactive materials, and one-13th of levels received on a one-way flight between Tokyo and New York.