Tokyo Electric Power Co. said Tuesday it detected a record-high 25,800 becquerels per kilogram of radioactive cesium in fish sampled within 20 km of the Fukushima No. 1 nuclear plant.
The figure is 258 times the level of cesium the government deems safe for consumption, indicating that radioactive contamination in the area remains serious more than a year after the nuclear crisis started.
According to the Fisheries Agency, the previous high for radioactivity density in fish was 18,700 becquerels per kilogram detected in cherry salmon.
Tepco said two greenlings caught Aug. 1 at a depth of 15 meters were used for the sampling. The Fisheries Agency also checked the fish and detected the same density level.