A monitoring of 5 points in offshore area of Ibaraki-prefecture has been 
conducted by the Ministry of Education, Culture, Sports, Science and 
Technology since April 25th, 2011. As a part of the monitoring, on May 5th,
samples were taken by the Japan Coast Guard and TEPCO conducted nuclide 
analysis of radioactive materials in these samples. 

 Appendix:The result of nuclide analysis <samples taken by a surveying  
          ship "Kaiyou" of the Japan Coast Guard> (PDF 27.0KB)  
 Appendix:Place of collections in offshore area of Ibaraki-prefecture 
                                                          (PDF 130KB)