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 September 13 and 14, 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, the 
radioactive materials described in the appendices were detected. 

We also conducted a nuclide analysis of Plutonium contained in the air 
which was collected on August 22 and 29. As a result, Plutonium was not 
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 37.0KB) 
Appendix2: Nuclide Analysis Results of Plutonium contained in the Air 
           Fukushima Daiichi Nuclear Power Station (PDF 8.22KB) 
Appendix3: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 19.6KB) 
Appendix4: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 8.22KB)