On March 21st, 2011, a sampling survey, conducted as a part of monitoring 
of surrounding environment, detected radioactive materials in the seawater 
around the water discharge port (south) of Fukushima Daiichi Nuclear Power 
Station which was damaged by the Tohoku-Chihou-Taiheiyou-Oki Earthquake. 
Therefore, we informed Nuclear and Industrial Safety Agency (NISA) and the 
government of Fukushima Prefecture of the results.

We have also informed NISA of the results of seawater sampling surveys 
which have been implemented since April 2nd at three different points 
within 15 km area of Fukushima Daiichi Nuclear Power Station. (Since April 
5th, sampling has been implemented at six different points, and since 
April 6th, it has been conducted twice a day at six different points.)

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

On April 11th, 2011, we conducted sampling surveys to evaluate the spread 
of radioactive materials which were detected at Fukushima Daiichi Nuclear 
Power Station. Since the radioactive materials were detected as shown in 
the appendix, we informed NISA and the government of Fukushima Prefecture 
of the results.

We implemented seawater sampling surveys at 11 different points of 6 
locations 15 km off the coast of Fukushima Daiichi Nuclear Power Station 
yesterday. We have also informed NISA of the evaluation results of the 
surveys.

We will continuously conduct the same sampling surveys. 

attachment1: The result of the nuclide analysis of the seawater 
                                                            (PDF 15.4KB) 
attachment2: Radioactivity Density of Seawater(PDF 10.6KB) 
attachment3: Radioactivity Density of Seawater at North of 1F 5 - 6 
              Discharge Channel(PDF 32.0KB)