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Tsunami Warning/Advisory

  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.)

Tsunami Warnings and Tsunami Advisories (9 min.)

Attention: These videos are currently unavailable on this page.
Contact details for inquiries:
 Office of International Affairs
 Japan Meteorological Agency
 Phone: +81-3-3211-4966
 E-mail:E-mail address

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