nhk world's kazuhiro takahashi reports. >> reporter: daidu sanpei, the curator in fukushima prefecture tomioka is in the no entry zone which was created after the nuclear crisis. the town government has a makeshift office in another municipality outside the zone. sanpei has been trying to raise awareness about the body of cultural assets for many years. the problem is that no one knows for sure the extent of the damage. municipal authorities haven't even been able to service some of the items. sanpei conducted the survey last november to gauge the situation. people around the museum are now discussing how to move the cultural treasures out of the building. a water leak has caused mold on the ceiling. the excess moisture is making the situation worse for preserving the artifacts. sanpei noticed broken fragments of ancient ware that are about 5,000 years old. the temperature has not been working because of a power outage. ancient documents and other valuable assets have been damaged. they will have to be removed immediately. sanpei and his survey team couldn't stay long enough to move th