On March 21st, 2011, we conducted sampling surveys, as a part of monitoring 
of surrounding environments, and detected radioactive materials in the 
seawater around the water discharge canal (of the south side) of Fukushima 
Daiichi Nuclear Power Station, which was damaged by the Tohoku - Pacific 
Ocean Earthquake. Therefore, we informed Nuclear and Industrial Safety 
Agency (NISA) and the government of Fukushima Prefecture of the results.
Since March 22nd, we have conducted seawater sampling surveys at four 
points off the shore of Fukushima Daiichi Nuclear Power Station (twice a 
day at two points out of such four points since March 26th).

Since April 17, we have also conducted sampling surveys at four points, 
3 km off the shore of Fukushima Daiichi Nuclear Power Station, two points, 
8 km off the shore of the Power Station and 6 points, 15 km off the shore 
of the Power Station and informed them of evaluation results.

The data of three detected nuclides (Iodine-131, Cesium-134 and Cesium-137) 
will be reported as fixed data. Other nuclide figures are to be 
re-evaluated based on the improved measures for recurrence prevention 
which have been prepared in accordance to a warning from NISA on April 1st.
(Previously announced)

On April 25th, 2011, we conducted sampling surveys to evaluate the spread 
of radioactive materials to the ocean which were detected at Fukushima 
Daiichi Nuclear Power Station. Since the radioactive materials were 
detected as shown in the exhibit, we informed NISA and the government of 
Fukushima Prefecture of the results.

We will continuously conduct the same sampling surveys.

attachment1:Results of Nuclide Analysis of Seawater(PDF 32.6KB)
attachment2:Radioactivity Density of Seawater(PDF 32.2KB)
attachment3:Radioactivity Density of Seawater (coast)(PDF 49.3KB)
attachment4:Radioactivity Density of Seawater (off the coast)(PDF 57.2KB)