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| Meteorological Agency of Japan | |
|---|---|
| Name | Meteorological Agency of Japan |
| Native name | 気象庁 |
| Formed | 1875 |
| Preceding1 | Central Meteorological Observatory |
| Jurisdiction | Japan |
| Headquarters | Tokyo |
| Employees | 2,000 (approx.) |
| Chief1 name | Takemasa Miyoshi |
| Parent agency | Ministry of Land, Infrastructure, Transport and Tourism |
Meteorological Agency of Japan is the national agency responsible for meteorological services, seismology, volcanology, and aeronautical meteorology in Japan. Established in the late 19th century during the modernization of Meiji period institutions, it operates a nationwide network of observatories, research centers, and data systems supporting civil aviation, maritime safety, and public disaster reduction. The agency cooperates with regional offices, academia, and international organizations to monitor atmospheric, oceanic, and geophysical hazards across the Pacific Ocean rim.
The agency traces origins to the Central Meteorological Observatory created under the Meiji government in 1875, reflecting influences from the United Kingdom and France on early meteorological science. During the Taishō period and Shōwa period expansions, it integrated seismological functions following major events such as the Great Kantō earthquake and the Tōhoku earthquake and tsunami (2011), adapting to changing needs of Imperial Japanese Navy aviation and later civil aviation under Tokyo International Airport operations. Postwar reorganization aligned the agency with ministries like Ministry of Transportation (Japan) and later the Ministry of Land, Infrastructure, Transport and Tourism, while collaborations with institutions such as the University of Tokyo, Japan Agency for Marine-Earth Science and Technology, and National Research Institute for Earth Science and Disaster Resilience advanced research priorities.
Headquartered in Tokyo, the agency comprises a Director-General office, regional meteorological observatories in prefectural centers (including Sapporo, Sendai, Niigata, Nagoya, Osaka, Fukuoka), and specialized divisions for seismology, volcanology, aviation meteorology, and climate analysis. It maintains liaison with the Cabinet Office (Japan), Japan Self-Defense Forces, and municipal authorities. Key affiliated entities include the Meteorological Research Institute and cooperative links with universities such as Kyoto University, Tohoku University, and Hokkaido University. Personnel include meteorologists, seismologists, volcanologists, and engineers certified under national licensure systems tied to the Ministry of Education, Culture, Sports, Science and Technology standards.
The agency issues weather forecasts, seismic alerts, volcanic warnings, and aviation meteorological briefings supporting Narita International Airport, Haneda Airport, and regional aerodromes. Responsibilities cover monitoring tropical cyclones (typhoons), providing tsunami advisories tied to sea-floor earthquakes, and issuing public warnings during heavy rainfall and landslide-prone events affecting prefectures like Kumamoto, Hiroshima, and Ishikawa. The agency compiles climatological normals in cooperation with the Japan Meteorological Business Support Center and contributes to national planning under frameworks such as the Basic Act on Disaster Countermeasures.
A dense observing network includes surface stations, upper-air radiosonde launches, Doppler weather radars, and geophysical sensors. The agency operates the Automated Meteorological Data Acquisition System (AMeDAS) stations across islands, maintains seafloor pressure gauges for tsunami detection, and deploys broadband seismic arrays. Instrumentation development draws on partnerships with private firms and research bodies like Toshiba, Mitsubishi Heavy Industries, and the National Institute of Advanced Industrial Science and Technology. Satellite meteorology relies on data from domestic satellites such as the Himawari series and international platforms including NOAA and EUMETSAT satellites.
Operational forecasting uses numerical weather prediction models run on high-performance computing facilities, assimilating observations from AMeDAS, radars, and satellites to produce short-range forecasts and probabilistic guidance. Warning systems include the Earthquake Early Warning service, coordinated with the Japan Meteorological Agency’s predecessors and successor structures, automated tsunami advisories relayed through the Japan Coast Guard and municipal sirens, and aviation meteorological information conforming to International Civil Aviation Organization standards. Public warning dissemination leverages mass media, mobile alerts, and coordination with broadcasters like NHK.
The agency’s research arm, the Meteorological Research Institute, conducts studies in numerical modeling, climate change attribution, volcanic eruption forecasting, and seafloor geodesy. It collaborates on long-term climate projects with the Intergovernmental Panel on Climate Change contributors from National Institute for Environmental Studies and engages in joint experiments with institutions such as Riken and JAMSTEC. R&D outputs include improved typhoon track models, probabilistic seismic hazard maps, and volcanic ash dispersion models used by civil aviation authorities and insurers.
Japan’s agency participates in multilateral mechanisms like the World Meteorological Organization, the United Nations Office for Disaster Risk Reduction, and Pacific tsunami warning networks. It assists neighboring states during major events, providing seismic and meteorological data to Taiwan, Philippines, South Korea, and Pacific island nations, and contributes to international search-and-rescue logistics through coordination with United Nations Office for the Coordination of Humanitarian Affairs. During the 2011 Tōhoku earthquake and tsunami, its data-sharing and advisories were central to international relief and reconstruction planning.
Public outreach includes educational programs for schools, partnerships with museums such as the National Museum of Nature and Science, and public-facing platforms offering forecasts, hazard maps, and historical data archives. The agency issues guidance for citizens in earthquake-prone regions like Honshu, promotes preparedness campaigns in collaboration with municipal governments and organizations like the Japanese Red Cross Society, and supports academic training through fellowships with universities and research institutes.
Category:Government agencies of Japan Category:Meteorological agencies