Measurement of airborne radioactivity from the Fukushima reactor   accident in Tokushima, Japan
  The airborne radioactive isotopes from the Fukushima Daiichi nuclear plan t was measured in Tokushima, western Japan. The continuous monitoring has been carried out in Tokushima. From March 23, 2011 the fission product $^{131}$I was observed. The radioisotopes $^{134}$Cs and $^{137}$Cs were also observed in the beginning of April. However the densities were extremely smaller than the Japanese regulation of radioisotopes. 
K. Fushimi, S. Nakayama, M. Sakama and Y. Sakaguchi
nucl-ex