Following a recent ban on beef from Japan's Fukushima Prefecture after the meat from more than 1,500 cattle was found to contain excessively high radiation levels, Kyodo news on July 23 reports on contamination in Miyagi Prefecture of meat from another 1,183 cattle who consumed radioactive feed prior to their slaughter.

http://www.bloomberg.com/news/2011-07-24/threat-to-japanese-food-chain-multiplies-as-cesium-contamination-
spreads.html
http://edition.cnn.com/2011/WORLD/asiapcf/07/19/japan.contaminated.beef/index.html
http://mdn.mainichi.jp/mdnnews/news/20110719p2g00m0dm044000c.html