Dencho Rename

Terms of service

Established: September 14, 2026. This is a translation of the Japanese version; if they differ, the Japanese version prevails.

These terms of service (the "terms") set out the conditions for using the web service Dencho Rename (https://dencho-rename.com, the "service") provided by the operator of Dencho Rename (the "operator"). Anyone who uses the service (a "user") agrees to these terms before using it.

Article 1 (The service)

  1. The service is a tool for renaming PDFs such as invoices and receipts using the transaction date, counterparty, amount and similar items, and for creating an index book (a list).
  2. Reading PDFs and creating file names happen inside the user's browser. The user's files are not sent to the operator's server.
  3. The service has a free plan and a paid plan. The features of each are as described on the pricing page.

Article 2 (Seller of the paid plan)

  1. The paid plan is sold by Polar Software, Inc. ("Polar") as the merchant of record. The user buys the paid plan from Polar, and the operator licenses its use under these terms.
  2. Polar's Checkout Buyer Terms apply to the purchase, payment, invoices and receipts, taxes, and payment disputes.
  3. These terms set out the conditions for using the purchased paid plan.

Article 3 (License keys)

  1. When the paid plan is purchased, Polar issues a license key (the "key"). Activating the key on the service's pricing page unlocks the paid features in that browser.
  2. One key can be activated in up to 3 browsers.
  3. The user may use the key only for the purchaser's own use (or, if a company purchased it, for use by that company's staff) and must not transfer, lend or publish it to third parties.
  4. If the key may have become known to a third party, the user should generate a new key in Polar's customer portal.

Article 4 (Fees, automatic renewal and cancellation)

  1. The fee for the paid plan is the amount (tax included) shown on the pricing page and on Polar's checkout page.
  2. The monthly plan renews automatically every month and the yearly plan every year, and the fee is charged at each renewal.
  3. The user can cancel at any time from Polar's customer portal. After cancelling, the paid features stay available until the end of the paid period.

Article 5 (Refunds)

  1. As a rule, paid fees are not refunded, including when the user cancels mid-period.
  2. Notwithstanding the preceding paragraph, if the user bought twice by mistake, or a defect in the service kept the user from using the paid features and the operator could not resolve it, the operator will refund after being contacted by the user.
  3. Polar may issue refunds under Polar's terms or payment network rules.
  4. This article does not limit any rights the user has under law.

Article 6 (Prohibited acts)

Users must not do any of the following.

  1. Acts that violate laws or public order and morals
  2. Placing excessive load on the service's servers, or accessing them without authorization
  3. Using paid features by bypassing or altering the license key check
  4. Sharing or reselling license keys
  5. Copying, redistributing or selling the service's programs or text without the operator's permission
  6. Any other act that interferes with the operation of the service

Article 7 (Checking results and files)

  1. Dates, amounts, counterparties and other items read automatically from PDFs are estimated from how documents are written and may contain errors. The user shall check the created file names and index book before using them for storage or tax filings.
  2. The service does not modify the original files; it creates renamed copies. The user should keep the original files.

Article 8 (Relation to legal requirements)

The service and its guide pages are based on public materials from Japan's National Tax Agency, but using the service does not guarantee that the requirements of the Electronic Books Preservation Act or any other law are met. How the law applies depends on the user's situation, so the user should confirm with a tax accountant or their tax office.

Article 9 (Changes, suspension and termination of the service)

  1. The operator may change the service. Changes that significantly reduce the features of the paid plan will be announced on the service's website at least 30 days in advance.
  2. The operator may temporarily suspend all or part of the service for maintenance, failures, failures of outside services used by the operator (such as Cloudflare and Polar), or other unavoidable reasons.
  3. The operator may end the service after announcing it on the service's website at least 30 days in advance. If paid time remains on a paid plan when the service ends, the operator will refund an amount in proportion to the remaining period.

Article 10 (Scope of liability)

  1. The operator does not guarantee that the service fits the user's particular purpose or is free of defects. However, when the operator learns of a defect, it will make reasonable efforts to fix it.
  2. If the operator's breach of obligation or tort causes damage to the user, the operator will compensate for the ordinary damage actually incurred by the user.
  3. In the case of the preceding paragraph, if the operator did not act intentionally or with gross negligence (i.e. in the case of slight negligence), the operator's compensation is limited to the total fees the user paid for the paid plan in the 12 months before the day the damage occurred (1,000 yen if the user used only the free plan).
  4. If the operator acted intentionally or with gross negligence, the limit in the preceding paragraph does not apply.

Article 11 (Rights)

Rights to the service's programs, screens, text and similar materials belong to the operator or their rightful holders. Rights to the files the user handles with the service and to the file names and index books the user creates belong to the user.

Article 12 (Changes to these terms)

The operator may change these terms in accordance with Article 548-4 of the Civil Code of Japan. When doing so, the operator will announce the changed content and its effective date on the service's website before that date.

Article 13 (Governing law and jurisdiction)

These terms are governed by the laws of Japan. Any dispute concerning the service is subject to the exclusive jurisdiction, in the first instance, of the district court with jurisdiction over the operator's address. However, this does not prevent a user who is a consumer from filing a suit in a court designated by law.

Article 14 (Contact)

For inquiries about the service, contact support@dencho-rename.com.