As part of monitoring activity of the surrounding environment, we conducted
an analysis of plutonium contained in the soil collected on March 21st and
22nd at the 5 spots in Fukushima Daiichi Nuclear Power Station. As a 
result, plutonium 238, 239 and 240 were detected. 
(Previously announced)

As the result of plutonium analyses in the soil from the sample at the 3 
periodic sampling spots collected on April 28th, plutonium 238 was detected
as shown in the attachment 1. 
Also, as a result of the gamma ray nuclide analysis in the same sample, we 
detected radioactive materials as shown in the attachment 2.
 
Today, we informed the Nuclear and Industrial Safety Agency and the 
government of Fukushima Prefecture of the results.

We will continue conducting the similar analysis. 

Attachment1: Fukushima Daiichi Nuclear Power Station: Plutonium analysis 
             result in the soil (PDF 9.20KB) 
Attachment2: Result of gamma ray nuclide analysis of soil(PDF 10.5KB)