Winst Report AutomationAmazon出品ブランド向け レポート自動取得アプリ

Winst Report Automation

English

What the application does

Winst Inc. provides account management services to multiple brands selling on Amazon under service agreements. Winst Report Automation is the application we provide to those selling brands. It uses the Amazon Selling Partner API to retrieve the sales, traffic, inventory, returns, settlement and brand analytics reports that would otherwise be downloaded by hand every month, so that accurate monthly and weekly business reports can be prepared for each brand.

Each brand authorizes Winst Inc. through Amazon's official OAuth flow from its own Seller Central account, and the application connects only to the accounts of brands that have authorized it. It does not connect to any selling account owned by Winst Inc. Winst Inc. operates the application on each brand's behalf, and the brand receives the resulting reports rather than operating the software itself. The only actions we ask of a brand are the initial authorization and the annual re-authorization required by Amazon.

Readiness: the application is built and in operation. Selling Partner API access was granted in September 2026, and all selling brands we serve under agreement have authorized the application from their own Seller Central accounts. Reports that require the Brand Analytics role will be provided within 90 days of that role being granted.

Features

• Automated report retrieval — scheduled daily, weekly and monthly retrieval of sales, traffic, inventory, returns, settlement and listing reports.
• Sales performance aggregation — sales, units, sessions and conversion rate by product and period.
• Inventory monitoring — the FBA inventory ledger, returns and storage fees; early detection of stock-outs and stagnant inventory.
• Search and brand analysis — Brand Analytics reports showing which search terms shoppers use and which products they actually buy, applied to listing improvement and advertising keyword design.
• Settlement reconciliation — settlement reports and fee breakdowns reconciled against sales at the product level.
• Report preparation and delivery — assembling the aggregated data into the monthly and weekly reports delivered to each brand.

Data accessed and corresponding roles

Amazon grants read and write operations together within a single role; there is no read-only variant of a role. Some of the roles we hold therefore include write operations by definition. Winst Report Automation mainly uses the read operations of the roles it holds. Write operations, such as listing, A+ content, price and inventory updates, FBA inbound plans, review solicitations and template messages to buyers, are performed only at the request or with the approval of the selling partner.

• Product Listing — listing information, listing status and product identifiers, to maintain a catalogue inventory. The create, update and delete operations included in this role are not used.
• Pricing — current listing and reference prices, recorded periodically to build price history. The price change and automated pricing operations included in this role are not used.
• Inventory and Order Tracking — order counts, shipment status and inventory movement, for sales aggregation. Buyer personal information is not retrieved and order records are not updated.
• Amazon Fulfillment — FBA inventory ledger, returns detail, storage fees and settlement reports. Inbound shipment plans are not created and no fulfilment instructions are issued.
• Amazon Warehousing and Distribution — AWD inventory quantities, to track warehoused stock. No inbound or outbound instructions are issued.
• Finance and Accounting — settlement reports, financial transactions and referral fee breakdowns, reconciled against sales at the product level.
• Selling Partner Insights — account status, seller performance metrics and seller feedback, to track account health.
• Brand Analytics — sales and traffic (sessions and conversion rate), search query performance, search terms, market basket, repeat purchase and coupon performance. These form the core metrics of the monthly and weekly reports, and are applied to listing improvement and advertising keyword design. They are used solely for the brand they came from, are never reused in reports for another brand, and are never offered to any third party as market-level intelligence.
• Buyer Communication — per order, the list of buyer contact actions that are permitted, to gauge how many orders may require buyer support. Message content and buyer personal information are not retrieved, and no messages are sent.
• Buyer Solicitation — per order, whether a review solicitation may be sent, to report how many orders are eligible. No review solicitation is ever sent.
• Amazon Logistics — delivery progress for orders shipped through Amazon Logistics, used to confirm that shipments in the reporting period have completed and to reconcile them against the monthly report. No deliveries are arranged or altered.
• Sustainability Certification — sustainability certification information attached to products, reflected in the product inventory. Certification records are not created or modified.

Data handling principles

We operate this service in accordance with Amazon's Acceptable Use Policy and Data Protection Policy. In particular:

• We do not aggregate data across brands. Data retrieved through the Selling Partner API for one brand is never combined with another brand's data and provided or sold to any party, including competing selling partners. Each brand's data is stored separately and used solely to report to, and advise, that brand.
• We do not calculate insights about Amazon's business (such as marketplace size, gross merchandise volume or growth rates), and we do not promote, publish or share any such insights, publicly or through any paid service. Nor do we use them for our own business purposes. All analysis is limited to the authorizing brand's own performance data.
• We do not use the data for competitor analysis.
• We do not retrieve personally identifiable information about buyers. We have not applied for the restricted roles that carry such data.
• Write operations are performed only on request. Listing, A+ content, price and inventory updates, FBA inbound plans, review solicitations and template messages to buyers are performed only at the request or with the approval of the selling partner.
• A brand may revoke our authorization at any time from within Seller Central, which immediately stops all data retrieval. No action or consent on our part is required.

Figures in our reports are aggregated from values returned by the Selling Partner API. Each report states the period it covers and the date the data was retrieved. If we introduce statistical or machine-learning models into our analysis, we will explain this and its accuracy to the brand in advance.

Pricing

The application is free of charge (JPY 0; pricing model: Free). It is provided at no additional cost to brands that have an account management agreement with Winst Inc. We do not charge separately for the application; it is provided as part of that agreement.

Related service fees. Our account management service, of which this application forms one part, is charged as a monthly fee, quoted individually. Because the scope of work differs for every brand, we do not publish fixed plans. A quote is determined by: (1) the number of brands and accounts covered, (2) the number of SKUs, (3) which services are included (listing management, page optimization, advertising, sales strategy support, account health support), and (4) the number and frequency of reports. Any set-up fee and minimum term are stated in writing in the quote; we do not invoice for anything not stated there. Work outside the agreed scope is quoted separately and started only after written acceptance.

Fees payable to Amazon — referral fees, FBA fees, storage fees and advertising spend — are separate, are paid by the brand directly to Amazon, and are not received by Winst Inc.

To request a quote, please use the form above or email info@winst.co.jp. We reply within 2–3 business days.

Provider

Application: Winst Report Automation
Provider: Winst Inc. (株式会社Winst)
Representative: Tomoki Katsuyama
KRP BIZ NEXT, 3F KRP Building No.4, 93 Chudoji Awata-cho, Shimogyo-ku, Kyoto 600-8815, Japan
Established: January 2023
Email: info@winst.co.jp ／ Web: https://winst.co.jp/
Support languages: Japanese, English

Our privacy policy is available at https://winst.co.jp/privacy.html.