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 8th, 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 planed to take sampling at six points at 15 km offshore yesterday. 
However, we canceled it due to the bad weather. Since the bad weather 
still continues today, sampling has been skipped.

We will continuously conduct the same sampling surveys. 

Appendix1: Results of Nuclide Analysis of Seawater <Shore>(PDF 55.7KB) 
Appendix2: Radioactivity Density of Seawater(PDF 49.2KB)