Establishment of vulnerability value for GNS and reflection to its disaster prevention strategy

The concept and the assessment method of Gross National Safety for natural disasters (GNS) were introduced and the initial calculation results were presented as the 2015 version of GNS. The results of GNS risk index including vulnerability and exposure are presented in the prefecture and municipality scales in Japan. We need to be aware that the Exposure index only based on five natural disasters is insufficient for the assessment of the risk. There are other factors such as flood disaster caused by heavy rain, which has currently caused serious damage in Japan. In this research, flood disaster was included in the Exposure index. It is essential not only to continuously update the data available but also improve and develop the range of application of GNS.