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[P-06] Spatial distribution of cause of death based on resident address of the deceased in the 2011 Tohoku Tsunami: A case study of Ishinomaki City, Miyagi prefecture

*Tomoki Serikawa¹, Shuji Seto^2,3, Hirokazu Kamata⁴, Anawat Suppasri^2,3, Fumihiko Imamura^2,3 (1. Graduate school of Engineering, Tohoku University, 2. International Research Institute of Disaster Science, Tohoku University, 3. Core Research Cluster of Disaster Science, Tohoku University, 4. School of Engineering, Tohoku University)

キーワード：2011 Great East Japan Earthquake tsunami, Data of the deceased, Cause of death, Science of human survival from disaster

It has been considered that the main cause of death during a tsunami is drowning. It is important to avoid tsunami not to be drown. Therefore, it has been focused on evacuation behavior to mitigate human damage. However, according to Kahoku shinpo (2011), there are victims who died from hypothermia after exposure tsunami. National Police Agency (2012) reported many kinds of cause of death other than drowning, such as Death due to fire, in the 2011 Great East Japan Earthquake tsunami. Seto and Imamura (2019) classified the cause of death into 12 groups; Injuries to the head, Injuries to the neck, Injuries to the thorax, Unspecified multiple injuries, Traumatic shock, Asphyxiation except drowning, Drowning, Death due to fire, Hypothermia, Heart disease, the others death and Death from unknown origin, in the tsunami by using data of the deceased provided by Miyagi Prefecture Police. These reports indicate necessity of measures for tsunami disaster that assumes other than drowning. To adopt such measures, regional characteristics of cause of death have to be clarified.

In this study, we revealed that spatial distribution of cause of death by mapping based on resident address of the deceased in Ishinomaki City, Miyagi prefecture. We aggregate the resident address according to postal code and cause of death according the classification proposed by Seto and Imamura (2019). From the analysis, we verified drowning outside the inundation area and death due to fire outside the area reported fire caused by the tsunami. According to the result, we clarified the issues about aggregation method based on resident address of the deceased. In further study, it is important to consider data other than fatality ratio, such as cause of death, in order to understand the situation of deceased for mitigate human damage.