Title: 30-nen no ayumi
Subjects: Emergency management, Ice and snow Building, Bōsai Kagaku Gijutsu Kenkyūjo, Research, Natural disasters, Bōsai Kagaku Gijutsu Kenkyūjo. Nagaoka Seppyō Bōsai Jikken Kenkyūjo, History
Places: Nagaoka-shi, Japan