Property due diligence in Japan

Know the disaster risk of any address in Japan.

Flood, earthquake, landslide, tsunami, storm surge and liquefaction — assessed from Japan's official government data (Overlay Hazard Map, J-SHIS). Purpose-built for buyers and investors who can't read Japanese hazard maps.

Check an address — free Developer API & MCP

Free API (beta)

Query any Japanese address and get a structured JSON risk assessment in English (?lang=en). CORS-enabled, attribution included. See the docs →

MCP server for AI

Add mamoie to Claude or any MCP client so your AI can answer "what is the disaster risk of this address?" with official Japanese data. Endpoint →

Try the address check

The interactive tool is currently in Japanese, but it works with any Japanese address. Open the checker →

Guides

Tokyo flood risk: how to check any address

The eastern lowlands, what the depth colors mean, and the shelter caveat most people miss ›

Buying property in Japan: disaster-risk due diligence

The six hazards, the shindo scale, liquefaction & insurance, and the disclosure your agent must give you ›

English disaster-risk report — $30 per address

A print-ready "disaster profile" for a specific property — flood depth & time-to-recede, house-collapse risk, earthquake ground data, liquefaction history, evacuation notes — in English. Check the address for free first; the report opens right after checkout. See a full sample →

Check an address — free View the sample report

Neutral, source-cited, no product pushing

mamoie states facts from official open data and always cites the source. It is reference information, not a guarantee of safety or investment/insurance advice. Resolution is map-pixel / ~250m mesh. See data sources.

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