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), 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 28th, 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.

Regarding the 14 sampling points off the shore, we could not take data 
yesterday due to the adverse weather.

We will continuously conduct the same sampling surveys. 

 
attachment1:Results of Nuclide Analysis of Seawater(PDF 16.3KB) 
attachment2:Radioactivity Density of Seawater(PDF 10.8KB) 
attachment3:Radioactivity Density of Seawater (coast)(PDF 23.8KB)