place 3 years before the events of the series takes place on Mount Aso. See also List of volcanoes in Japan Aso Shrine Aso Volcano Museum References General Cited External links Asosan - Japan Meteorological Agency Asosan: National catalogue of the active volcanoes in Japan - Japan Meteorological Agency Aso Volcano - Geological Survey of Japan Asosan - Smithsonian Institution: Global Volcanism Program Aso Geopark Volcanoes of Kyushu VEI-7 volcanoes Active volcanoes Subduction volcanoes Calderas of Kyushu Mountains of Kumamoto Prefecture Complex volcanoes Supervolcanoes Volcanoes of Kumamoto Prefecture Volcanic eruptions in 2021