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 August 24, 2011, we conducted a nuclide analysis of radioactive 
materials contained in the air which was collected at the site of Fukushima 
Daiichi and Daini Nuclear Power Stations. As a result, no radioactive 
materials were detected as described in the appendix.  
Also, we conducted an analysis about plutonium in the air which was 
collected on August 8, but no plutonium has been detected as described in 
the appendix.

We reported the above results to NISA as well as to the government of 
Fukushima Prefecture today. 

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 13.8KB) 
Appendix2: Fukushima Daiichi Nuclear Power Station  Analysis Result of  
           Plutonium in the Air (PDF 7.72KB) 
Appendix3: West Gate of Fukushima Daiichi Nuclear Power Station Results of 
           Dust Nuclide Analysis (PDF 12.9KB) 
Appendix4: Fukushima Daini MP-1 Results of Dust Nuclide Analysis 
                                                              (PDF 12.7KB)