1. Japan Atomic Energy Agency, Nuclear Fuel Cycle Engineering Laboratories, Naka-gun, Ibaraki-ken, Japan
2. Japan Atomic Energy Agency, Mizunami Underground Research Laboratory, Mizunami-shi, Gifu-ken, Japan
3. Japan Atomic Energy Agency, Horonobe Underground Research Center, Horonobe, Japan
4. Chugai Technos Corporation, Tsukuba Bio-Frontier Center, Tsukuba, Ibaraki, Japan