In Japan, a number of universities, research institutes, and administrative organizations continue to conduct observations on volcanoes according to their respective roles. They also promote the distribution and sharing of observation data and have collaborated with each other. Japan Volcanological Data Network (JVDN) is a framework that strengthens this cooperation, promotes volcano research, and contributes to volcanic disaster mitigation. In this paper, we report the overview, progress, tasks, and future prospects of the system being developed for JVDN that was initiated in 2016. The observational data collected from each organization is stored in a database and shared using visualization tools to promote collaborative research, (e.g., multi-disciplinary research for eruption prediction) and cooperation between organizations. Furthermore, this database will contribute to volcanic disaster mitigation measures through collaboration between the volcano research community and administrative organizations responsible for volcanic crisis management. Adaptation to the standards of the international WOVOdat database will also promote cooperation with research institutes worldwide.

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