When an earthquake occurs, the Japan Meteorological Agency (JMA) estimates the possibility of tsunami generation from seismic observation data. If disastrous waves are expected in coastal regions, JMA issues a Tsunami Warning/Advisory for each region expected to be affected based on estimated tsunami heights.
JMA also issues information on tsunami details such as estimated arrival times and heights.
Flow of issuance of information about tsunami and earthquake
Explanation about Tsunami Warning/Advisory and Tsunami Information
Videos Educational video on tsunami safety.
Escape the Tsunami! (17 min.)
Preparing for Tsunamis (18 min.)
Office of International Affairs
Japan Meteorological Agency
Brochures and Leaflets