Check whether a product can proceed, then test whether the economics work. A market-entry decision needs two different answers: whether the product can proceed toward sale, and whether the expected unit economics are attractive. JAPAN API STORE keeps those decisions separate, then lets the Profitability API reuse supported Sellability facts.
Built in Japan · English-first JSON · Official and public source provenance · No government endorsement claimed
WHAT YOU CAN BUILD NO SIGN-UP · NO API KEY
Start the market-entry workflow Use the free guided Market Check for one continuous experience, or run the production Sellability and Profitability endpoints separately.
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
# 1. Check sellability
curl -X POST https://api.japanapistore.com/v1/sellability/check -H "Authorization: Bearer ${JAPAN_API_KEY}" -H "Content-Type: application/json" -d '{"product_name":"Wireless earbuds","origin_country":"CN"}'
# 2. Calculate profitability with confirmed facts
curl -X POST https://api.japanapistore.com/v1/profitability/calculate -H "Authorization: Bearer ${JAPAN_API_KEY}" -H "Content-Type: application/json" -d '{"product_name":"Wireless earbuds","cost":{"amount":15,"currency":"USD"},"origin_country":"CN","selling_price":{"amount":5980,"currency":"JPY"},"channel":"amazon_jp"}'Representative response Fields depend on evidence and input.
{"sellability":{"status":"REVIEW_REQUIRED","missing_information":[{"field":"technical_conformity_number"}]},"profitability":{"status":"PROFITABLE","estimated_profit_jpy":1170,"confidence":43,"missing_fields":["international_shipping","hs_code","domestic_logistics"]}}SOURCES, FRESHNESS, LIMITS
Evidence you can inspect—not a black-box “Japan answer.” Regulatory sources and financial inputs keep separate dates and assumptions; the combined flow does not flatten them into one false certainty.
Used for Import procedures, restricted goods and other-law confirmation requirements.
Freshness The response exposes source links and applicable data versions where available.
Transformation Rules are mapped to product facts and unresolved facts remain review items.
Used for Applicable statutes and authority-specific public guidance by product category.
Freshness Source selection depends on category and the public material available at request time.
Transformation JAPAN API STORE returns conservative statuses, authorities, required actions and missing information.
Used for Tariff, customs valuation and official customs exchange-rate inputs when available.
Freshness Rates and source dates remain visible in the response; user-provided values override labeled defaults.
Transformation Costs are calculated deterministically and returned as an auditable breakdown.
Used for Consumption-tax context and published channel fees.
Freshness Each assumption is labeled; unavailable live facts are not invented.
Transformation JAPAN API STORE combines cost inputs into profit, margin and break-even values. Important limitations No API can replace final regulator, customs, tax or professional review for a high-risk launch. Profit output remains provisional while costs or product facts are missing. The workflow is decision support, not government approval or a guarantee of commercial success. 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. 