In disaster response, it is said to be ideal establishing the disaster management cycle. Broadcasters are also expected to contribute to the prevention and mitigation of damage by reporting in accordance with this cycle. Therefore, in order to clarify the ideal form of broadcasting and the issues, we analyzed a radio program that have continued since the Great Hanshin-Awaji Earthquake. As a result, it was found that when disaster coverage was focused on a single disaster and continued over a long period of time, the content of the coverage changed in line with the disaster management cycle. In addition, it became clear that it is important for long-term disaster reporting to have academic experts and supporters appear repeatedly in the program to the extent that they become "familiar" to listeners.

In this study, the authors considered the utilization of information systems in the collection, aggregation, and management of damage information necessary for disaster assessment, as a case study on the disaster damage assessment of public civil engineering facility in the 2016 Kumamoto Earthquake. For the information collection, aggregation, and management on damage to public engineering facility, which has been conducted since the Kumamoto earthquake occurred, the work-flow was that each Promotion Bureau in Kumamoto Prefecture aggregated the information collected by patrol members, and they reported the aggregated information to its River Division. In the beginning, the information was reported on paper and photographs, and it was necessary to input and organize the information again when the higher-level organization compiled it. Therefore, an information system based on Web-GIS was introduced and utilized to collect, consolidate, and manage the information collected by the patrol members in a centralized manner, and to facilitate the utilization of the consolidated information by its Promotion Bureau and the Prefecture. Unstructured interviews with prefectural officials pointed out that the use of the information system reduced the burden of inputting and organizing damage information, and that proper information management may enable efficient responses to external organizations. On the other hand, when introducing a Web-GIS-based information system, the problems of setting user permissions for viewing and editing, the image of using the system in relation to actual disaster assessment, and the linkage with other systems were identified as issues that cannot be solved. This will become a necessary condition for the introduction and utilization of such information systems.

In this study, the supply routes of waterworks in the Nishi-mikawa region of Aichi Prefecture were graphed and applied to ongoing discussions with higher-level administrators to consider collaboration in the event of a disaster. As a result, concrete proposals for cooperation were presented, and it was shown that the following three points were useful in the materialization of regional cooperation: (1) continuity of themes, (2) dialogue with upper management principal, and (3) visualization of cooperation targets through graphing efforts. In addition, with a view to applying the graph to the consideration of more effective collaboration measures, a person in charge of disaster prevention at a local government indicated that the graph could serve as a basic document for collaboration.

Many casualties have been caused by sudden disasters such as terrorism and fires all over the world. Such disasters are disasters that first occur in local areas and then spread. We are conducting research and development of an Emergency Rescue Evacuation Support System (ERESS) for the purpose of promptly detecting the occurrence of such a local sudden disaster and providing disaster information with real-time characteristics to the evacuees. This system uses sensors mounted on mobile terminals such as smartphones to quickly detect disasters by collecting data on human movements via wireless communication. In the conventional ERESS, the evacuation route when a disaster occurs at one place is displayed on the terminal and evacuation guidance is performed, but evacuation guidance for multiple disasters is not considered. Therefore, in this paper, we propose an evacuation guidance method in a disaster at multiple locations. Evacuation guidance experiments have been conducted in a disaster at multiple locations to verify the effectiveness of the proposed method.

When a large-scale disaster is predicted, wide-area evacuation is required in advance. Government agencies are required to secure transportation and evacuation facilities to support evacuation by residents. By grasping the number of residents in dangerous areas in real time, evacuation support activities can be planned appropriately. In 2020, a relatively large-scale pre-evacuation was carried out when Typhoon No. 10 struck. Recently data on the flow of people based on mobile phone management information has been provided nationwide in near real time. Using this data, we estimated the number of people in Kumamoto City and verified the usefulness of the data.

In analysis on the people flow data, we adopted a model that can take into account the effects of irregular holidays and hourly rainfall, as well as daily and weekly periodicity. As a result of data analysis, we were able to grasp the increase and decrease of the resident population in the flooded area. Before the typhoon hit, more residents stayed at home than in normal times. And we were able to see an increase in visitors in the area where the hotel is located. However, it was not possible to grasp that the number of residents increased in the area where the evacuation site was located. We conclude that analyzing the data separately for residents and visitors is useful for the purpose of detecting vitality in dangerous areas. In addition, we also need to use OD data in order to grasp the inflow and outflow status in more detail

In September 2019, in Oshima town, 1522 houses were damaged by the storm caused by the approach of Typhoon No. 15. The evacuation rate at that time was 4 %. About a month later, as typhoon No. 19 approached, and the evacuation rate at that time improved to 11%. This improvement in the evacuation rate was thought to be the result of the effects of typhoon information coverage and the experience of the disaster caused by typhoon No. 15. Based on the analysis of evacuation behavior in these typhoon cases suggest that the residents made the decision to evacuate based on evacuation advisories, but started actual evacuation due to the approaching typhoon and feeling of danger. According to the questionnaire survey the reasons for the residents evacuating were mostly TV broadcasting and rain conditions. And there were many opinions that detailed forecasts such as rain, damage status, disaster risk and urgency were needed to trigger evacuation.

Therefore, in order to promote the voluntary evacuation of residents, we think that information showing the risk and urgency of disasters that allows residents to feel the urgency of danger is effective. Specifically, they are materials on past disasters that reflect regional characteristics. If these materials are used to support evacuation, residents will be able to imagine the danger and imminence of a disaster in their daily lives and will be able to make their own decisions and take evacuation actions.

If these materials are shared by local governments and residents and used as support information for evacuation, it is expected that residents will be able to familiarize themselves with the danger and urgency of disasters and make their own decisions on evacuation, leading to evacuation actions.