By Susumu Yoshida / Staff Writer
Radioactive substances spewed out by the quake-stricken Fukushima No. 1 nuclear power plant have likely spread to western Japan and Hokkaido, according to a team of Japanese, U.S. and European scientists.Their findings were published in the Nov. 14 online edition of the Proceedings of the U.S. National Academy of Sciences.
Japan’s science ministry said radioactive contamination spread only as far west as the areas near the border between Nagano and Gunma prefectures. However, it conceded there was a possibility, albeit small, of contamination west of that line.