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 December 16, 2011, we conducted nuclide analysis of radioactive 
materials contained in the air which was collected at the site of 
Fukushima Daiichi and Daini Nuclear Power Stations. Radioactive materials 
were not detected as shown in the attachment.
 
Furthermore, as the analysis results of plutonium in the air collected on 
December 5, plutonium was not detected as shown in the attachment.
 
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 1.8KB) 
Appendix2: The Result of analysis for Pu in the air around Fukushima 
           Daiichi (PDF 7.64KB) 
Appendix3: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.5KB) 
Appendix4: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.4KB)