Japanese data. Built in Japan for global developers. JAPAN API STORE is a focused entry point for developers building products for Japan. Four production APIs turn fragmented Japanese public systems into English-first, source-backed JSON without hiding uncertainty.
Built in Japan · English-first JSON · Official and public source provenance · No government endorsement claimed
WHAT YOU CAN BUILD 01 Address Normalize a Japanese address 02 Business Resolve a public company record 03 Sellability Screen a product for Japan 04 Profitability Estimate landed economics NO SIGN-UP · NO API KEY
Choose a real no-sign-up demo Start with the developer question you have now. Every demo is rate-limited, uses no API key, and leads to the matching production contract.
Try it before you register
Can this product be sold in Japan? Enter a product name and category. Add details only when you have them.
Your current assessment will appear here. You will see a decision, confidence score, reasons, optional next details, and official sources.
Ready to use it in your product? Create a free account, issue an API key, and call Japan Sellability API from your application.
PRODUCTION REQUEST
Copy a request, then inspect the actual response contract. The free key uses the same documented endpoint. Put the secret in a server-side environment variable and never commit it.
cURL TypeScript Python Copy
curl -X POST https://api.japanapistore.com/v1/address/resolve \
-H "Authorization: Bearer ${JAPAN_API_KEY}" \
-H "Content-Type: application/json" \
-d '{"query":"〒100-0005 東京都千代田区丸の内1-1"}'Representative response Fields depend on evidence and input.
{"request_id":"…","success":true,"match":{"status":"matched"},"address":{"prefecture":"東京都","municipality":"千代田区","town_area":"丸の内"},"sources":[{"provider":"japan_post","status":"matched"}]}SOURCES, FRESHNESS, LIMITS
Evidence you can inspect—not a black-box “Japan answer.” Each API reports source-specific freshness. There is no single platform-wide date that can truthfully replace those source versions.
Used for Postal codes, prefectures, municipalities, town areas and kana.
Freshness The active source version is returned in API provenance.
Transformation JAPAN API STORE normalizes fields and reconciles them with Digital Agency address evidence.
Used for Structured Japanese address identifiers, hierarchy and coordinates where public evidence exists.
Freshness Dataset version and source status are returned separately from Japan Post.
Transformation Matches are graded without treating coordinate precision as address precision.
Used for Public corporate number, legal name, head-office address and change status.
Freshness The response reports source status and observed data version.
Transformation Legal-form placement and name variants are normalized into English-friendly JSON.
Used for Public qualified-invoice issuer registration status.
Freshness Registration evidence is fetched and reported with source provenance.
Transformation Corporate and invoice evidence are joined without implying government endorsement. Important limitations This is an independent service, not a Japanese government service or endorsement. Coverage differs by source and product; missing evidence remains explicit. Sellability output is decision support, not legal approval; profitability values are estimates. FREE DEVELOPER TIER
Use the demo now. Create a key only when you are ready to build. No credit card for the free key. One dashboard gives access to the four existing APIs. 