Masataka Shimizu, president of Tokyo Electric Power Co (TEPCO), the operator of the crippled Fukushima Daiichi nuclear power plant, bows to evacuees from Namiemachi at an evacuation center in Nihonmatsu, Fukushima prefecture in this picture taken by Kyodo on May 4, 2011. The residents of Namiemachi have been evacuated since the March 11 earthquake and tsunami damaged the nuclear plant in northern Japan, sparking the worst nuclear crisis since Chernobyl in 1986. [Photo/Agencies]