At Kagamidaira hut (Gifu Prefecture). They transport what they need for management by helicopter. Strong wind blows when a helicopter approaches. Although all the windows of a hut are shut down, grit sneaks in from a crevice. After taking down the load, the helicopter carries used gas cylinders, garbage, etc. away to the foot of the mountain. Beforehand, they have been covered with the huge net. And it is attached to the metallic part which are hanging down from the helicopter by a man’s hand. The low-altitude flight rarely seen. Both of the pilot and the hut staff are so cautious to this job.