ETV (NHK) reported Japanese government prohibited their own staff from researching Fukushima contamination situation without a permission of directors as of 5 May 2011.
Associate professor Kimura from Dokkyo Medical University researched Tokai village nuclear accident as staff of National Institute of Radiological Sciences.
After moving to Ministry of Health, Labour and Welfare, he researched Chernobyl spontaneously.
However, directors of Ministry of Health, Labour and Welfare banned him from researching Fukushima contamination after 311. He resigned.
He regrets he couldn’t make the most of his experience in Tokai village nuclear accident and Chernobyl.
Internet site reference: http://fukushima-diary.com/2012/05/ministry-of-health-labour-and-welfare-banned-staff-from-researching-fukushima-contamination