Terms of Service

This English text is a reference translation provided for convenience. The Japanese 利用規約 (Terms of Service) is the authoritative version; in the event of any discrepancy, the Japanese version governs.

1. Scope

These Terms of Service (the "Terms") govern the use of Yadozei 宿税 — the accommodation-tax data API, the tax calculator, the rule-change alerts, and related services (together, the "Service") — provided by BenStay LLC (ベンステイ合同会社; "we" or "us"), as agreed between us and the user. These Terms form part of our contract with you where you agree to their incorporation, or where we display our intention to incorporate them before use begins and the requirements of Article 548-2(1) of Japan's Civil Code are satisfied.

2. Definitions

  1. "User" means the individual or entity that uses the Service.
  2. "API" means the application programming interface we provide for accommodation-tax calculation.
  3. "Data" means the accommodation-tax rates, tiers, exemption thresholds, effective dates, and other data provided through the Service.

3. The Service

  1. The Service comprises the public tax calculator and per-municipality information pages (free), the accommodation-tax data API and dataset delivery (paid), rule-change alerts by email, and related features.
  2. Which features are free or paid, and their scope, are as set out on the pricing page or as otherwise specified by us.

4. Eligibility, accounts and API keys

  1. Paid plans are available only to corporations and individuals using the Service in the course of or for their business. Applicants represent that their use of the paid plan meets this condition. This restriction does not apply to free services. Consumer status under Japan's Consumer Contract Act is determined under that Act, rather than by the designation made when applying.
  2. Use of a paid plan requires an API key issued by us.
  3. You are responsible for keeping your API key and credentials secure, and must not disclose, lend, or transfer them to any third party.
  4. You are responsible for consequences and losses arising from inadequate management, misuse, or third-party use of your API key to the extent attributable to you. Our liability for damages is governed by Section 8.

5. Fees and payment

  1. The fees, payment method, and payment timing for paid plans are as set out on the pricing page, in a quotation, or in an individual agreement.
  2. Payment method and other transaction terms follow our statutory commerce disclosure (特定商取引法に基づく表記).

6. Prohibited conduct

In using the Service, you must not:

  1. violate any law or public order and morals;
  2. infringe the rights of us or any third party;
  3. copy, redistribute, or resell the Data beyond the scope licensed under your plan;
  4. circumvent access or rate limits, or otherwise access the Service improperly or impose an excessive load;
  5. interfere with the operation of the Service; or
  6. engage in any other conduct we reasonably deem inappropriate.

7. Nature of the Data and your responsibility

  1. The Data is reference information compiled by us from public sources such as each municipality's published information, and does not constitute tax or legal advice.
  2. Accommodation-tax rules change frequently, and the Data may contain errors, omissions, or out-of-date information. We make no warranty of any kind, express or implied, as to the accuracy, completeness, currency, timeliness, or fitness for a particular purpose of the Data, any calculation result, or any rule-change alert. Nor do we warrant whether, when, or with what content an alert is sent.
  3. Collection, reporting and payment of accommodation tax are the responsibility of the persons legally obliged to perform them. Before using the Data or calculation results for yourself or a third party, or incorporating them into your products or services, you must verify their contents and applicable conditions against each municipality's official information and applicable law. Each area page on the Service links to its official source.
  4. We bear no responsibility whatsoever for any discrepancy between the Data or a calculation result and the actual tax due, for under- or over-collection of tax, for additional tax, penalties, or late-payment charges of any kind, or for claims by municipalities, guests, or other third parties (except as provided in Sections 8.3 and 8.5).

8. Disclaimer of warranties and exclusion of liability

  1. The Service is provided "AS IS". We make no warranty of any kind, express or implied, including that the Service will run without interruption, delay, or error, or that it is free of security defects.
  2. We bear no liability whatsoever for any loss you suffer in connection with the use of, or inability to use, the Service.
  3. Section 8.2 and every other exclusion in these Terms do not apply to loss caused by our willful misconduct or gross negligence.
  4. Except in the cases covered by Sections 8.3 and 8.5, and only where we are legally liable for damages, compensation is limited to ordinary, direct loss actually incurred. Aggregate compensation for damage arising from the same cause or a related series of causes is limited to the contractual monthly fee for the affected paid plan when the cause first arose; non-monthly fees are converted to a monthly amount according to the period covered. For free services, the limit is ¥10,000. Lost profits and indirect or special damages are excluded. Tax legally payable regardless of use of the Service is not included in loss.
  5. If our contract with you is a consumer contract under Japan's Consumer Contract Act, Sections 8.2 and 8.4 and any other provision of these Terms wholly excluding our liability for damages do not apply. Only where we are legally liable for damage caused by negligence, excluding gross negligence, of us, our representatives, or persons we use to provide the Service, compensation is limited to ordinary, direct loss actually incurred, subject to an aggregate limit of ¥10,000 for damage arising from the same cause or a related series of causes. This paragraph does not create liability for damages that does not otherwise exist under law.

9. Changes, suspension, and termination

We may make changes to the Service that do not alter the contract at any time. Changes to the contract are governed by Section 15. We may temporarily suspend the Service where necessary for maintenance, incident response, or other operational needs, and discontinue it for reasonable business reasons. For suspension or discontinuation of paid services, we will give reasonable advance notice proportionate to its nature and impact, except in emergencies or where advance notice is otherwise impracticable. For free services, we have no advance-notice obligation except where required by law or an individual agreement. Refunds are governed by Section 13, and our liability for damages by Section 8 (we are not liable for any loss these cause you, except as provided in Sections 8.3 and 8.5).

10. Indemnification

If a third party (including a municipality or a guest) brings a claim against us arising from a breach of these Terms or infringement of third-party rights attributable to you, you must indemnify us, to the extent corresponding to your responsibility, for loss actually incurred and attorneys' fees reasonably necessary to respond. You have no indemnification obligation for the portion attributable to us, our representatives, or persons we use to provide the Service.

11. Intellectual property

  1. The free open-source library (japan-stay-tax) is governed by the MIT License set out in its repository.
  2. Copyright and other intellectual property rights in this website's content, the compiled dataset, and the Service belong to us or the respective rights holders.

12. Personal information

We handle your personal information in accordance with our Privacy Policy.

13. Term and cancellation

The term and cancellation conditions of a paid plan are as set out in an individual agreement or on the pricing page. You may request ordinary cancellation for your convenience at any time, effective from the next billing period. In that case, fees for the current billing period are not refundable while the Service remains available during that period. This does not restrict statutory termination rights arising from our non-performance or statutory restitution rights. We will return prepaid fees attributable to periods after we discontinue provision for our own reasons. Aggregate penalties and liquidated damages received or retained upon cancellation of a consumer contract will not exceed the average loss under Article 9(1)(i) of Japan's Consumer Contract Act.

14. Exclusion of anti-social forces

You represent and warrant that you are not, and will not be, an organized-crime group or other anti-social force. If you breach this provision, we may suspend the Service or terminate the agreement without a prior demand for performance or remedy.

15. Changes to these Terms

We may amend these Terms when the requirements of Article 548-4(1) of Japan's Civil Code are satisfied. We will announce the amendment, its revised contents and its effective date on this website or by another appropriate method. Amendments under item (ii) of that paragraph will be announced before their effective date. Amendments outside that Article require individual agreement with the user.

16. Governing law and jurisdiction

These Terms are governed by the laws of Japan. Any dispute between us and the User arising in connection with the Service shall be subject to the exclusive jurisdiction of the Tokyo District Court as the court of first instance.

17. Contact

Please reach us through the contact form.

Effective 5 October 2026　/　BenStay LLC (ベンステイ合同会社)