AdvertisementRadioactive Leak Stopped, Japan Plant Operator SaysApril 05, 2011NPR Staff and WiresfacebookEmailA broker walks between fish at the Hirakata Fish Market in Kitaibaraki, Ibaraki prefecture. The Health Ministry said that iodine-131 at a level of 4,080 becquerels per kilogram had been detected in a small fish called konago, or sand lance, caught off Ibaraki prefecture, south of the plant. (AFP/Getty Images)