Source:
Japan TimesThe move comes after a similar decision by the city of Date, Fukushima Prefecture, which has radiation hot spots where exposure could exceed the 20-millisievert limit during the course of a year.
-snip-
In April, the ministry set a limit of 3.8 microsieverts per hour for playground use at schools in the prefecture. Together with estimated exposure from outside of school grounds, total annual exposure could grow to 20 millisieverts. Many schools in Fukushima Prefecture have already acted on their own and banned students from using their school grounds over fears of radiation exposure.
Numerous schools are also attempting to scrape away contaminated soil.
Read more:
http://search.japantimes.co.jp/cgi-bin/nn20110615a2.html
And... this won't happen until the Fall, when I'm guessing kids won't be outside nearly as much as in the summer.
(They are also going to give the gauges to parents with children less than 3 years old if requested.) Talk about feeling like a guinea pig -- wearing an exposure badge like crews going into the Fukushima power plant ought to really make parents think about what is going on there.