masami yoshizawa is the exception. most people heeded the government's evacuation order and fled in waves. leaving ghost towns in their wake. we ventured into towns inside and around the exclusion zone which remain empty today. eerily silent and frozen in time at the moment residents fled the quaking earth and incoming sea. many expected to return once the tuft settled and the water re-seeded. instead lopping-time residents stayed away, afraid of what many call the invisiblen my that haunts hundreds of square miles. >> the meteor is showing 3.2 microseekers of ratiatidiation. that's the highest we have seen. >> tens of thousands that fled the town have yet to return hope. the nuclear refugees are scattered throughout japan, living in temporary facilities like these. i talked with a resident from fukushima who barely escaped the tsunami. what was it that told you it was time to get out of your house? >> translation: about 30 minutes after the earthquake i went to look at the river. i saw the tide rushing out to sea in a

. >> yoshizawa has tested positive to international exposure to the radioactive sezium 184 and one . he is receiving monitoring and those levels have dropped. >> i'm not going to get hysterical or have a mental breakdown from it. >> but fear of radiation remains strong and yoshizawa is the exception. most heeded the evacuation order and fled in waves leaving ghost towns behind. we went in the evacuation zone, remains empty, eerily silent. many expected to return once the dust settled and the waters receded. instead even long term residents have stayed away, are afraid of what many call the invisible enemy that haunts the hundreds of square miles around fukushima daiichi. >>> this meter is showing clearly the highest reading we have seen the whole time we have been here in japan. >> the tens of thousands who fled the towns near the stricken plant have yet to return home. these nuclear refugees are scattered throughout japan. katsanobu sakarai, the mayor, is trying to convince residents to come home. the city lost 85% of its population. >> no good comes from agonizing over the past. so