On March 28th 2011, we were advised from Nuclear Safety Commission of
Japan to enhance the sampling survey regarding water in underground floor
of the turbine building of Fukushima Daiichi Nuclear Power Station. In
order to verify any leakages to underground and sea, and safety, we have
been implementing the sampling survey of subsurface water and seawater.
                                                   (Previously announced)

On April 13th 2011, we had conducted sampling survey regarding subsurface
water (sub-drain) near the turbine building of Fukushima Daiichi Nuclear
Power Station. Today, we had informed the result to Nuclear and Industrial
Safety Agency (NISA) and the government of Fukushima Prefecture, because
radioactive materials were detected as shown in the attachment.

We will continue to conduct same kind of sampling survey. 

Appendix 1:Fukushima Daiichi Nuclear Power Station Results of Nuclide 
           Analysis of sub-drain (PDF 9.45KB) 
Appendix 2:Fukushima Daiichi Nuclear Power Station Radioactivity Density 
           of Sub-drain (PDF 18.8KB)