Japan Atomic Energy Agency
Kamisaibara is the site of the first discovery of an outcropping of uranium ore within Japan. After discovery, the Ningyō-tōge Office of Atomic Fuel Corporation (now called the Ningyō-tōge Environmental Engineering Center of the Japan Atomic Energy Agency) was built in 1957. The site has been involved in the "development of front-end technologies for the nuclear fuel cycle, namely, uranium exploration, uranium mining, refining, and enrichment."