Nuclear Regulator Dismissed Seismologist on Quake Threat

Tomohiro Ohsumi/Bloomberg

Japan Atomic Power Co.'s Tsuruga nuclear power station in Tsuruga city, Fukui prefecture, Japan. Reactor 1 at the Tsuruga plant, which had its license extended for 10 years in 2009, is one of 13 on Wakasa bay, a stretch of Sea of Japan coast that is home to the world’s heaviest concentration of nuclear reactors.