Head Office   Head Office, Shinjuku Ward, Tokyo, under-takes the general administration, planning and management of the Institute, as well as the marine environmental radioactivity monitoring program. Towa-edogawabashi Bldg. 7F. 347 Yamabuki-cho, Shinjku-ku, Tokyo 162-0801 Japan Tel: +81-3-5225-1161 Fax: +81-3-5225-1160 Central Laboratory   Central Laboratory was established, as our major research facility, in November 1979 in Onjuku Town, Chiba Prefecture, where clean seawater is available for experimental work. 300 Iwawada Onjuku-machi Isumi-gun, Chiba 299-5105 Japan Tel: +81-470-68-5111 Fax: +81-470-68-5115 Demonstration Laboratory   Demonstration Laboratory was constructed in November 1984 in Kashiwazaki City, Niigata Prefecture, adjacent to Kashiwazaki-Kariha Nuclear Power Plant of Tokyo Electric Power Company. Actual warmed effluent of the power plant is available for experiments. 4-7-17 Arahama Kashiwazaki-shi, Niigata 945-0322 Japan Tel: +81-257-24-8300 Fax: +81-257-24-5576