Risk intelligence · Earthquake and tsunami

Screen Japanese property regions against disaster exposure.

Japan cannot be reduced to one hazard score. A coastal machiya district, volcanic island village, river basin, and mountain onsen town face different combinations of shaking, tsunami, liquefaction, landslide, access, and evacuation risk. This page is AKIYAZ’s public framework for turning government and scientific datasets into a region-by-region diligence resource.

Enter another address Review official sources
Live checksAddress resolution, elevation context, seismic signal.
No proxy launderingUnsupported hazard layers stay unknown.
Private receiptsExact query evidence is retained for dossiers.

Decision rule

Identify obvious exposure early. Confirm the details before money is at risk.

A public screen cannot replace local hazard maps, engineers, insurers, or legal review. It can make the next broker call, field inspection, specialist check, and evacuation question much sharper.

Regional context

Compare common exposure patterns

Use the regional profiles to understand why the same price or building type can carry very different diligence questions in a coast, island, river basin, historic district, or mountain valley.

Regional panels are curated context. Use the live property screen below for source-backed coordinate evidence; unsupported layers are no longer converted into fake numeric scores.

Use my address

Primary question

Next field check

Exposure readout

Screening level

Important: This is an acquisition-screening aid, not a replacement for municipality hazard maps, architect/engineer review, insurance underwriting, evacuation planning, or legal explanations of important matters before contract.

Property screen

Enter an address or coordinate.

This screen uses official Japanese government and scientific sources for a first-pass diligence brief. Treat it as a starting point: tsunami, flood, landslide, evacuation, and building-condition questions still need local confirmation.

Coordinates override the address if both are supplied. This is an early diligence screen, not a safety, legal, insurance, or engineering determination.

Diligence brief

No parcel screened yet

Submit an address or coordinate to generate a first-pass diligence brief.

Result band

Waiting

Observations

    Diligence checklist

      Data checks performed

      Assessment method

      Layer the evidence before judging the property.

      The useful question for property diligence is not “is Japan dangerous?” It is “what type of exposure is this exact place carrying, and what design, insurance, evacuation, and resale consequences follow?”

      Ground motion

      Use J-SHIS to identify probabilistic shaking and fault influence, then ask whether the building’s age, structure, roof weight, and retrofit history match that exposure.

      Tsunami and storm water

      Use MLIT/GSI hazard maps and local inundation assumptions to test elevation, distance to coast/river, and safe vertical or horizontal evacuation.

      Liquefaction and ground

      Screen reclaimed land, alluvial plains, old river courses, and soft-ground layers before pricing renovation or foundation work.

      Access after disaster

      Check bridge, tunnel, ferry, mountain road, and island dependencies. A beautiful property can become operationally fragile if there is only one route in or out.

      Building survivability

      Combine hazard layers with actual construction: year built, seismic code era, timber frame condition, retaining walls, slope, roof, drainage, and emergency utilities.

      Buyer-use consequences

      Translate exposure into practical terms: retrofit budget, insurance availability, lender comfort, guest safety, evacuation signage, and disclosure obligations.

      Official sources

      A transparent source trail, with clear limits.

      The public screen names the agencies and source families behind the assessment, then states what each source can and cannot prove. Property-specific advice still depends on the exact site, local maps, building records, and professional review.

      National Research Institute for Earth Science and Disaster Resilience (NIED)

      National seismic hazard source family

      The live parcel screen checks an official seismic-intensity signal for the resolved coordinate. This can support the earthquake-shaking layer only.

      Use limit: Mesh-level hazard data is not a structural survey and does not identify retrofit condition, foundation quality, roof weight, or building survivability.

      Open public source family

      Geospatial Information Authority of Japan

      Official geospatial coordinate resolution

      The live parcel screen resolves Japanese address text into a screening coordinate before querying source-backed context layers.

      Use limit: Address geocoding can resolve to an approximate place label rather than a surveyed parcel boundary; exact lot checks still require registry, survey, and local map confirmation.

      Open public source family

      Geospatial Information Authority of Japan

      Official elevation / topography context

      The live parcel screen requests approximate elevation for the coordinate, then treats it as context rather than a hazard verdict.

      Use limit: Elevation alone is not tsunami, flood, liquefaction, or landslide exposure. Those layers stay unknown until official local hazard polygons are checked.

      Open public source family

      MLIT / Geospatial Information Authority of Japan

      Hazard Map Portal Site

      Reference portal for official hazard-map layers including tsunami inundation, flood, landslide, storm surge, and evacuation information published by national and local authorities.

      Use limit: Use the portal and municipality hazard maps for final local confirmation. National datasets are useful for screening; local maps remain authoritative for parcel-level inundation, landslide, and evacuation details.

      Open public source family

      Cabinet Office, Government of Japan

      Nankai Trough earthquake countermeasures

      National scenario planning, damage assumptions, and policy context for Nankai Trough earthquake and tsunami exposure in relevant coastal regions.

      Use limit: Scenario pages are regional planning context, not a parcel-level determination.

      Open public source family

      Japan Meteorological Agency

      JMA earthquake and tsunami information

      Operational warnings, observations, earthquake intensity information, and public alert context for interpreting official disaster communication.

      Use limit: Operational warning pages explain current/observed events and alerting context; they do not replace acquisition due diligence.

      Open public source family

      What the screen gives you

      A clearer first conversation before a viewing.

      • 1. A quick read on shaking, elevation, coastal water, slope, and access exposure.
      • 2. A short list of unknowns to raise with the broker, municipality, architect, or engineer.
      • 3. Pointers to the official map categories that need local confirmation.
      • 4. Practical consequences for renovation budget, insurance, guest safety, evacuation, and resale.
      • 5. A reason to either stop early or spend the next round of diligence more intelligently.

      Responsible framing

      What we should and should not claim.

      Say

      “This public-data screen shows likely exposure layers and the next diligence questions.”

      Avoid

      “This property is safe” or “this property will flood.” Only licensed specialists and official local determinations can close that gap.

      Request a property risk screen