On March 22, 2011, as a part of monitoring activity of the surrounding
environments, we conducted nuclide analyses of radioactive materials
contained in the air which was collected at the site of Fukushima Daiichi
Nuclear Power Station, which was damaged by the Tohoku- Chihou-Taiheiyou-
Oki Earthquake. As a result, radioactive materials were detected and
therefore, we summarized the results and reported them to Nuclear and
Industry Safety Agency (NISA) as well as to the government of Fukushima
Prefecture.

The analyses results of the three nuclides (Iodine-131, Cesium-134 and
Cesium-137) are to be released as fixed figures, and the other nuclide
figures are to be revaluated.
                                                    (Previously announced)

On July 28, 2011, we conducted nuclide analysis of radioactive materials
contained in the air which was collected at the site of Fukushima Daiichi
Nuclear Power Station on the same day. As a result, radioactive material
was not detected as described in the appendix. 

We conducted sampling for an analysis of plutonium contained in the air on
July 18. As a result, no plutonium was detected as described in the
appendix.  

We will continuously conduct the same sampling surveys. 

Appendix1: Nuclide Analysis Results of Radioactive Materials in the Air at 
           the Sites of Fukushima Nuclear Power Stations (PDF 12.8KB) 
Appendix2: Result of Plutonium Measurement in the air at Fukushima Daiichi 
           Nuclear Power Station (PDF 8.02KB) 
Appendix3: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 15.2KB) 
Appendix4: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 13.3KB)