The green oasis of Hiroshima Peace Memorial Park, built at what was once the hypocenter of an atomic blast, is the most visible sign of the city's renaissance as a vibrant and forward-looking center, and a force for peace in the midst of the turbulence of 21st century politics. But it is not the only reminder of the tenacious spirit of life in Hiroshima. Less well-known outside of neighborhood boroughs are the scores of "survivors" dotting the metropolitan...