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, another 3 points from April 30, total of 
9 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 May 1st, 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 at 17 points offshore, surveys were conducted at 
three points due to bad weather yesterday. 

We will continuously conduct the similar sampling surveys. 

Appendix1:Results of Nuclide Analysis of Seawater (PDF 61.1KB) 
Appendix2:Radioactivity Density of Seawater (PDF 29.4KB)