Dressed in protective plastic coveralls and white boots, Yuji Onuma stood in front of the row of derelict buildings that included his house, and sighed as he surveyed his old neighborhood.

On the once-bustling main street, reddish weeds poked out of cracked pavement in front of abandoned shops with caved-in walls and crumbling roofs. Nearby, thousands of black plastic bags filled with irradiated soil were stacked in a former rice field.

"It's like visiting a graveyard," he said.