Radioisotope Waste. Wastes generated from unsealed radioisotopes or radiopharmaceuticals that were supplied through Japan Radioisotope Association, or generated by radiation generators defined by the Radiation Hazards Prevention Act. Radioisotope wastes are collected and treated in accordance with their properties safely and efficiently. The treated radioisotope wastes are packed in containers and managed under controlled conditions. Ⅲ Symbols The following symbols are used in the tables. ‐ ：Nil ・ ：Class or item not applicable 0 ：Figure less than 0.5 Ⅳ Districts and Prefectures The following serial number is given to each prefecture. 01 Hokkaido 24 Mie Prefecture 02 Aomori Prefecture 25 Shiga Prefecture 04 Miyagi Prefecture 27 Osaka Prefecture 06 Yamagata Prefecture 29 Nara Prefecture 07 Fukushima Prefecture 30 Wakayama Prefecture 09 Tochigi Prefecture 32 Shimane Prefecture 10 Gunma Prefecture 33 Okayama Prefecture 11 Saitama Prefecture 34 Hiroshima Prefecture 12 Chiba Prefecture 35 Yamaguchi Prefecture 13 Tokyo 36 Tokushima Prefecture 16 Toyama Prefecture 39 Kochi Prefecture