Japan's nuclear regulator expressed growing alarm on Wednesday at increased contamination beside the seafront of the stricken Fukushima Daiichi nuclear power station and urged the plant's operators to take protective measures.
Shunichi Tanaka, head of the new Nuclear Regulation Authority, told reporters he believed contamination of the sea had been continuing since the March 2011 catastrophe.
"I think contamination of the sea is continuing to a greater or lesser extent," Tanaka said. "It was contaminated at the time of the accident, but I think it has been continuing for the last two years. Coming up with countermeasures against all possible scenarios is a top priority."