輸入利益チェッカー — Import Profit Checker

Field notes

The form separates product classification, import costs, and per-unit sales assumptions, then provides output fields for per-unit profit, margin, break-even price, and a maximum purchase price. Its explanatory sections spell out Japanese customs rounding steps, simplified tariff eligibility, and the distinction between personal imports and resale; the page also says EPA rates are not supported. It lists an MCP endpoint, calculation API, item list, currency-rate endpoint, and an AI-oriented guide, though the extracted page does not verify those interfaces in operation.