Distribution map of radioactivity concentration in the seawater around TEPCO Fukushima Daiichi Nuclear Power Station (survey related to the leaked water from a pipeline between a desalination unit and a tank of concentrated water on April 5, 2012 <164ｔｈ report>) (sampling date; around TEPCO Fukushima Daiichi Nuclear Power Station Dec 12, 2012) (published Dec 14, 2012) Distribution map of radioactivity concentration in the seawater around TEPCO Fukushima Daiichi Nuclear Power Station (survey related to the leaked water from a pipeline between a desalination unit and a tank of concentrated water on April 5, 2012 <164ｔｈ report>) (sampling date; around TEPCO Fukushima Daiichi Nuclear Power Station Dec 12, 2012) (published Dec 14, 2012)