Observed arrival · 2026-08-27
The Japan-market decision stack
JAPAN API STORE offers four APIs for checking product sellability, estimating profitability, and working with Japanese business and address data.
Field notes
The documented sellability request accepts product characteristics and returns a decision state alongside confidence, missing information, and follow-up requirements. In the displayed Bluetooth-speaker example, the result is REVIEW_REQUIRED with confidence 68 because a technical conformity number is missing. The adjacent profitability workflow keeps marketplace fees, FX, logistics, customs duty, tax, estimated profit, margin, and break-even price visible as separate parts of the calculation.
Observed signals
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Editorial observations of this landing page, not a rating.
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