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 6 and 7, 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
detected as shown in the attachment.

Furthermore, as the analysis results of strontium in the air collected on
November 14, and plutonium in the air collected on November 21, they were
not detected as shown in the attachment (1 and 2)

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 17.0KB) 
Appendix2: The Result of analysis for Sr in the air around Fukushima 
           Daiichi(PDF 8.02KB) 
Appendix3: The Result of analysis for Pu in the air around Fukushima 
           Daiichi(PDF 7.64KB) 
Appendix4: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 20.0KB) 
Appendix5: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.4KB)