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

We have also informed NISA on the results of seawater sampling survey 
which has been implemented since April 2nd at three different points 
within 15km area of the Fukushima Daiichi Nuclear Power Plant. 

The data of three nuclides (Iodine-131, Cesium-134 and Cesium-137) will be 
reported as fixed data. Other nuclides figures are to be reinvestigated by 
improved measures under NISA instruction on April 1st.
                                                    (We already informed.)

On April 5th, 2011 we conducted sampling survey to evaluate the spread of 
the radioactive substances which were detected at Fukushima Daiichi 
Nuclear Power Station. Since the survey detected radioactive substances as 
shown in appendix, we informed NISA and Fukushima Prefecture about the 
result.

Also, we added 3 additional sampling points within 15km area (6 points in 
total) yesterday, and we informed NISA and Fukushima about those results 
today.

We are intending to conduct the same sampling investigation. 

Appendix1: The result of the nuclide analysis of the seawater(Around the 
           discharge canal (north) of Unit 5 and 6 Fukushima Daiichi 
           Nuclear Power Station)(PDF 12.1KB) 
Appendix2: The result of the nuclide analysis of the seawater(Around the 
           discharge canal (south) of Fukushima Daiichi Nuclear Power 
           Station)(PDF 12.1KB) 
Appendix3: The result of the nuclide analysis of the seawater(Around the 
           north water discharge canal of Fukushima Daini Nuclear Power 
           Station (around Units 3 and 4))(PDF 10.3KB) 
Appendix4: The result of the nuclide analysis of the seawater(Around 
           Iwasawa shore at Fukushima Daini Nuclear Power Station) 
                                                          (PDF 10.3KB) 
Appendix5: The result of the nuclide analysis of the seawater(Around 15km 
           off shore of Fukushima Daiichi Nuclear Power Station)(PDF 12.0KB) 
Appendix6: The result of the nuclide analysis of the seawater(Around 15km 
           off shore of Fukushima Daini Nuclear Power Station)(PDF 11.9KB) 
Appendix7: The result of the nuclide analysis of the seawater(Around 15km 
           off shore from Iwasawa Sea Shore)(PDF 11.8KB) 
Appendix8: The result of the nuclide analysis of the seawater(Around 15km 
           off shore from Hirono Town)(PDF 10.2KB) 
Appendix9: The result of the nuclide analysis of the seawater(Around 15km 
           off shore from Minami-Soma City)(PDF 10.2KB) 
Appendix10: The result of the nuclide analysis of the seawater(Around 15km 
            off shore from Ukedogawa River)(PDF 10.2KB) 
Appendix11: Samples are examined at Fukushima Daini Nuclear Power Station 
                                                               (PDF 46.9KB) 
Appendix12: Radioactivity Density of Seawater(PDF 35.1KB)