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 (2 
points are added since April 26, total of 6 points) of 3 km off the shore 
of Fukushima Daiichi Nuclear Power Station, two points of 8 km off the 
shore of the Power Station and 6 points of 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 30th, 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.

As to sampling surveys offshore, from April 30th, we added three sampling 
points 3km off the shore. We were planning to conduct at seventeen points 
in aggregate. However because of the bad weather, we conducted at eleven 
points inclusive of the three additional points.

We will continuously conduct the similar sampling surveys. 

Appendix1:Results of Nuclide Analysis of Seawater (PDF 76.0KB) 
Appendix2:Radioactivity Density of Seawater (PDF 42.8KB)