利用規約

Terms of Service

English Version — Effective 9 September 2026

1. Scope

These terms govern the use of Winst Report Automation (the "Application") and the account management service of which it forms part (the "Service"), both provided by Winst Inc. ("we", "us"). Where these terms differ from an individual agreement signed between us and a customer, the individual agreement prevails.

2. What the Service is

We carry out listing and account operations on behalf of customers selling on Amazon. The Application is used within that work to retrieve reports through the Amazon Selling Partner API and to prepare monthly and weekly business reports. The scope of work, the reports produced and their frequency, and the Amazon stores covered are set out in each customer's individual quotation and agreement.

3. Connecting to your Amazon account

The Application connects to a customer's account only after that customer has authorized us through Amazon's official OAuth flow from their own Seller Central account. A customer may revoke that authorization at any time from within Seller Central, which stops all data retrieval immediately; no action or consent on our part is required. Under Amazon's rules the authorization is renewed annually, and if we add a data role we may need to ask for a fresh authorization.

We do not accept or hold a customer's Seller Central username, password or access keys, and we will never ask for them. If you receive such a request purporting to come from us, please contact us.

4. What we do not do

• Write operations by the Application, 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.
• We do not retrieve personally identifiable information about buyers.
• We do not aggregate data across customers' businesses in order to provide or sell it to any party, including competing selling partners.
• We do not calculate, promote, publish or share insights about Amazon's own business.
• We do not use the data for competitor analysis.

5. Your obligations

Customers must comply with their agreements with Amazon, including the Amazon Services Business Solutions Agreement, and must not use the Service for any purpose that breaches those agreements, breaches the law, or infringes the rights of others. If we believe a customer is using our service in breach of their agreement with Amazon, we will notify Amazon as required and stop retrieving data from that account.

6. Fees

• The Application is free of charge. It is provided at no additional cost to customers of the Service, and is not charged for separately.
• The Service is charged as a monthly fee, quoted individually. The amount, any set-up fee, any minimum term, and payment terms are set out in each quotation and agreement.
• We do not invoice for anything not stated in the quotation. 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 customer directly to Amazon, and are not received by us.

7. Termination and data

Notice periods are set out in each individual agreement. On termination we stop retrieving the customer's data. We delete a customer's data within 30 days of any of the following: the customer revokes our authorization; the agreement ends; the customer asks us to delete it; or Amazon instructs us to delete it. We confirm once deletion is complete. Records we are legally required to retain are kept only for that period.

8. Intellectual property

Intellectual property rights in the Application and the Service belong to us or to the rightful owner; these terms transfer no such rights. Rights in the product information, images and selling data entrusted to us by a customer remain with that customer.

9. Disclaimer

Data retrieved by the Application consists of values returned by the Amazon Selling Partner API, and its accuracy and completeness depend on Amazon. We do not warrant the accuracy of data supplied by Amazon. We are not liable where the Service cannot be provided for reasons outside our control, such as changes to Amazon's specifications, outages, suspension of API access, or revocation of authorization by the customer; we will report any such event promptly. We do not guarantee business outcomes arising from decisions a customer makes on the basis of our reports.

10. Limitation of liability

Where we are liable for loss caused by our fault, our liability is limited to the fees for the Service received from that customer in the month in which the cause of the loss arose, except in cases of our wilful misconduct or gross negligence.

11. Relationship with Amazon

Winst Inc. is not an affiliate of Amazon.com, Inc. or its affiliates, and is not endorsed or sponsored by them. Winst Report Automation is developed and provided by Winst Inc.; it is not created or approved by Amazon.com, Inc. or its affiliates. Amazon and all related marks are trademarks of Amazon.com, Inc. or its affiliates. We operate the Application in compliance with Amazon's Acceptable Use Policy, Data Protection Policy and Solution Provider Portal Agreement.

12. Changes to these terms

We may revise these terms in response to changes in law or in the Service. Revisions are published on this page with the date of revision. We give advance notice of any material change that is disadvantageous to customers.

13. Governing law and jurisdiction

These terms are governed by and construed in accordance with the laws of Japan. The Kyoto District Court shall have exclusive jurisdiction as the court of first instance for any dispute arising in connection with the Service.

14. Contact

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
Email: info@winst.co.jp
We reply within 2–3 business days.