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2004: Kozushima-mura2006: Oshima-machi2008: Hachijo-machi 2010: Niijima-mura2012: Kozushima-mura2013: Niijima-mura2015: Miyake-mura 2016: Oshima-machi, Toshima-mura2017: Hachijo-machi, FY2018: Ogasawara Village2019: On-map training at all islandsFY2021 Island-wide training2022: Kozushima Village2023: Oshima Aogashima-muraMikura jima-muraAogashima-muraMiyakejima Island (role-playing)2022: Joint general disaster preparedness training between TMG and Kozushima Village(9) Measures for Volcanic Eruptions　In regard to Tokyo Metropolitan Government's volcanic disaster prevention measures, the Tokyo Metropolitan Regional Disaster Prevention Plan (Volcanoes), which is based discussions by the Volcanic Disaster Prevention Committee as well as experiences from past volcanic disasters, establishes the following disaster prevention measures based on the characteristics of an offshore island.　Early preparation　We plan to take urgent actions such as the construction of provisional dams when volcanic eruptions occur with the aim of protecting human life from landslide disasters along with volcanic eruptions. We have produced and stored concrete blocks used for provisional dams as "preparations at normal times" in order to efficiently take urgent measures.　Observation System for the Izu Islands　TMG has set up an observation system which includes seismographs and inclinometers on each of the Izu Islands (except for Izu Oshima) to monitor volcanic activities.　Izu Oshima is monitored by the national authorities through an extensive observation network. Data are shared by TMG, the Japan Meteorological Agency, the national authorities, and other research institutes.　Disaster Preparedness Training　In anticipation of volcanic eruptions, earthquakes, tsunami, etc., TMG jointly conducts disaster preparedness training with the island municipalities.47