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Points to keep in mind
① The inundation depth and other risk information displayed in
this service is based on the storm surge inundation area maps created and
published by the Tokyo Metropolitan Government.
Points of "Maps of Storm Surge Inundation Risk Areas"
  • A typhoon of the country past maximum scale (the Muroto Typhoon order :910hPa) is assumed.
  • A course of the typhoon which makes the biggest storm surge occur to Port of Tokyo is set.
  • A flood at a river is considered simultaneously with storm surge.
  • The worst situation is assumed and the burst by which it's for an embankment is expected.
② Please refer to the "Maps of Storm Surge Inundation Risk Areas (Explanatory Material)" for
more details on the simulation conditions of inundation.
Open the "Maps of Storm Surge Inundation Risk Areas" page of the Bureau of Port and Harbor
③ Although this service is interlinked with address data or GPS functions,
discrepancies may occur between locations indicated on the maps the actual locations.
④ We cannot guarantee the integrity of the service.
These maps are intended for use as rough guides to help the reader consider matters related to evacuations.
⑤ The background topographic map may not accurately reflect the current conditions in some areas.
⑥ In the event of data updates, maintenance, or emergencies, all or part of the Service is subject to
change or suspension without notice.
⑦ Unauthorized diversion of the screen etc. from the service is prohibited.

If you agree to the above, please click below to use the
"The Storm Surge Risk Search Service ".