Consultation with the Agency for Cultural Affairs is necessary whenever someone other than the owners wish to move national treasures and important cultural properties from places where they are kept to other prefectures and to exhibit them. When museums borrow cultural properties for the first time for exhibitions, the National Research Institute for Cultural Properties, Tokyo is commissioned by the Fine Arts Division, Cultural Properties Department of the Agency for Cultural Affairs to inspect the museum environment, including its temperature, humidity and indoor environment, and to submit a report. Each year about 20 to 30 environmental inspections are made, but the number is especially large during autumn when many special exhibitions are held. This year, 14 cases of environmental inspections have been conducted at museums in preparation for special exhibitions which are held mainly from September to November, and reports have been submitted. Museum environment thus inspected, materials of cultural properties to be borrowed, duration of the loan and exhibition are examined comprehensively and the suitability of the environment within the museum is judged.