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 9 and 10, 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,
radioactive materials were 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 18.8KB) 
Appendix2: Fukushima Daiichi Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 11.8KB) 
Appendix3: Fukushima Daini Nuclear Power Station Results of Dust Nuclide 
           Analysis (PDF 10.5KB)