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| JMA (Japan Meteorological Agency) | |
|---|---|
| Name | Japan Meteorological Agency |
| Native name | 気象庁 |
| Formation | 1875 |
| Headquarters | Tokyo |
| Region served | Japan |
| Parent organization | Ministry of Land, Infrastructure, Transport and Tourism |
JMA (Japan Meteorological Agency) The Japan Meteorological Agency is the national meteorological authority responsible for weather forecasting, earthquake and tsunami warning, volcanic monitoring, and climate observation in Japan. It operates a nationwide observational network, issues public warnings for natural hazards, conducts meteorological research, and represents Japan in international meteorological organizations. The agency's work intersects with institutions such as the Ministry of Land, Infrastructure, Transport and Tourism, World Meteorological Organization, International Oceanographic Commission, and domestic entities like the Japan Coast Guard and Geological Survey of Japan.
Founded in 1875 during the Meiji era, the agency evolved from early observatories influenced by figures such as H. M. Wilson and the diplomatic exchanges of the Treaty of Kanagawa. During the Taishō and Shōwa periods it expanded by integrating services from the Imperial Japanese Navy and the Imperial Japanese Army meteorological units. Postwar restructuring under the Occupation of Japan redefined its role alongside ministries including the Ministry of Agriculture and Commerce and later the Modern Ministry of Transport. Landmark events shaping its mission include the Great Kantō earthquake, which drove enhancements in seismic observation, the 1964 Niigata earthquake, and the 2011 Tōhoku earthquake and tsunami, which prompted reforms in tsunami warning protocols and coordination with organizations like United Nations agencies. Over decades the agency adopted technologies pioneered by entities such as European Centre for Medium-Range Weather Forecasts and collaborated with spacecraft programs including Himawari satellite series and partnerships with National Aeronautics and Space Administration initiatives.
The agency is headquartered in Tokyo and organized into regional meteorological offices correlating with prefectures including Hokkaido Prefecture, Aomori Prefecture, Osaka Prefecture, and Okinawa Prefecture. Its internal bureaus coordinate specialized divisions for seismic observation, tsunami warning, volcanic monitoring, and climate analysis. Leadership interacts with the Ministry of Land, Infrastructure, Transport and Tourism and advisory panels composed of academics from institutions like University of Tokyo, Tohoku University, Kyoto University, and Nagoya University. International liaisons include permanent representatives to the World Meteorological Organization, delegations to the Intergovernmental Panel on Climate Change, and contacts with regional bodies such as the North Pacific Marine Science Organization.
The agency issues forecasts, warnings, and advisories covering weather, earthquakes, tsunamis, volcanic activity, and marine conditions. It provides aviation meteorological services to airlines regulated by Japan Civil Aviation Bureau and delivers marine warnings to organizations like the Japan Coast Guard and ports including Port of Tokyo and Port of Osaka. Climate monitoring supports national programs tied to the Paris Agreement reporting and collaborations with the Global Climate Observing System. Public safety functions coordinate with emergency agencies such as the Fire and Disaster Management Agency and municipal authorities across cities like Sapporo, Sendai, Nagoya, and Fukuoka. Educational outreach engages with museums and centers like the National Museum of Nature and Science and universities including Hokkaido University.
JMA operates a dense network of surface stations, upper-air sounding sites, seismic stations, tide gauges, and volcanic observatories. Satellite operations rely on the Himawari geostationary series and partnerships with Geostationary Operational Environmental Satellite programs. Radar installations include Doppler systems and X-band radars used across prefectures from Kanagawa Prefecture to Kagoshima Prefecture. Seismic instrumentation is integrated with networks like the Hi-net system and collaborates with global seismic catalogs maintained by organizations including the United States Geological Survey and European-Mediterranean Seismological Centre. Oceanographic observations draw on buoys and collaborations with research vessels from institutions such as the Japan Agency for Marine-Earth Science and Technology and programs like Argo.
Forecasting combines numerical weather prediction models, ensemble systems, and nowcasting tools informed by agencies such as the European Centre for Medium-Range Weather Forecasts, Met Office, and National Oceanic and Atmospheric Administration. JMA issues multi-tier warnings including special earthquake bulletins, tsunami advisories, volcanic eruption warnings, and storm surge alerts; these are coordinated with emergency declarations from the Cabinet Office (Japan) and local governments in prefectures like Ibaraki Prefecture and Miyagi Prefecture. Aviation forecasts follow standards of the International Civil Aviation Organization while marine forecasts align with the International Maritime Organization. The agency has integrated early-warning dissemination through mass media partners like NHK and telecommunications platforms operated by companies such as NTT.
Research programs span atmospheric science, seismology, volcanology, oceanography, and climate change, often in partnership with universities like Tohoku University, Nagoya University, Kyushu University, and research institutes including the National Institute of Advanced Industrial Science and Technology and Japan Agency for Marine-Earth Science and Technology. International collaboration includes membership in the World Meteorological Organization, participation in Intergovernmental Panel on Climate Change assessments, joint projects with European Centre for Medium-Range Weather Forecasts and National Oceanic and Atmospheric Administration, and data exchange with the China Meteorological Administration, Korea Meteorological Administration, and Philippine Atmospheric, Geophysical and Astronomical Services Administration. The agency contributes to global initiatives such as the Global Atmosphere Watch and supports disaster risk reduction efforts tied to programs by the United Nations Office for Disaster Risk Reduction and the International Tsunami Information Center.
Category:Scientific organizations based in Japan