The local government staff in charge of volcanic disaster prevention often do not experience volcanic disaster response, because they move to other sections every few years, and volcanic disasters are low-frequency disasters. However, when a volcanic disaster occurs, they need understanding of the phenomenon and experience and information for response to respond promptly and accurately. Therefore, we organize the knowledge and information necessary for disaster mitigation work, and develop a prototype volcano information portal (VIP) website for municipalities’ disaster response. First, we conducted a request survey targeting volcanic disaster prevention personnel and organized the requirements. Second, we developed the VIP such that not only was posted information on volcanic disaster prevention of various organizations posted on the website, but also materials and videos that can be used for explanations to residents, and those that can be used for training. Third, after developing the website, we surveyed volcanic disaster prevention members about the usability of the VIP. Finally, we updated the VIP based on the results for using their disaster mitigation work.

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