Iodine 131 measured in Kawasaki, Yokohama, Chiba and Gunma
Following up this article..Iodine 131 measured in Yamanashi
From March to April, Iodine 131 was measured from dried sewage sludge in Gunma and Chiba.
In Kawasaki, Iodine 131 has been measured since 5/13/2011.
They measured Iodine 131 from dried sewage sludge in Yokohama, on 4/3/2012.