Why Worry? Japan's Nuclear Plants at Grave Risk From Quake Damage Ishibashi Katsuhiko August 11, 2007 I had warned that a major earthquake would strike the Chuetsu region around Kashiwazaki, Niigata Prefecture, and about the fundamental vulnerability of nuclear power plants. The 6.8 magnitude temblor of July 16 caused considerable damage to the Kashiwazaki-Kariwa Nuclear Power plant operated by Tokyo Electric Power Co. (TEPCO), proving me right. In the 40 years that Japan had been building nuclear plants, seismic activity was, fortunately or unfortunately, relatively quiet. Not a single nuclear facility was struck by a big quake. The government, along...