Hazard Score — Genkan
How to use
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Double-click the map to drop a pin on any location in Japan. The hazard lookup starts instantly.
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Or paste a link — Google Maps URLs, raw coordinates, and DMS formats are all accepted in the text field below the map.
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Read the gauge — the composite score (1.0–4.0) is a weighted average of 6 hazard categories. Check the breakdown for individual contributions.
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Watch for severe alerts — if any single hazard hits level 4, a red warning appears even if the composite looks moderate.
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Override if needed — click the 1–4 buttons on any hazard card to manually set a level based on local knowledge or a specialist report.
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Compare up to 3 — save properties to the comparison table to see all hazards side by side, including flood depth and critical alerts.
Genkan · Tool

Property Hazard Score

Paste a Google Maps link and get an instant risk assessment — earthquake, flood, tsunami, landslide, typhoon, and volcanic activity. Powered by Japanese government hazard sources, with estimated fallback values where official data is unavailable.

Property Location
Double-click to select location
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Also accepts maps.app.goo.gl/… links, 35.6812, 139.7671, or DMS format
Hazard Ratings
Composite Hazard Score
Recommended Data Sources

Sources: J-SHIS (NIED) · MLIT ハザードマップポータル · 東海大学 宇津研究室 API · JMA 気象庁