Legal

Terms of Service

Last updated: May 2026

Notice on language precedence: This English version is provided as a courtesy translation for convenience. In the event of any discrepancy or conflict between this English version and the Japanese version, the Japanese version shall prevail.

These Terms of Service (the “Terms”) set forth the rights and obligations between Blockchain Lock Inc. (the “Company”) and registered users regarding the use of the UnlockOS smart lock service (the “Service”). These Terms apply to all relationships between the Company and registered users concerning the use of the Service.

Article 1 – Scope

  1. These Terms set forth the rights and obligations between the Company and registered users regarding the use of the Service, and apply to all relationships between the Company and registered users concerning the use of the Service.
  2. Rules, regulations, and policies (including the Privacy Policy) posted on the Company's website from time to time shall constitute a part of these Terms. Registered users shall use UnlockOS-compatible devices sold by the Company and shall comply with both these Terms and the “Sales Terms of Use.”

Article 2 – Definitions

The following terms used in these Terms and the Service Agreement shall have the meanings set forth below:

  • “External SNS Service” means social networking services provided by third parties (such as Facebook) designated by the Company that provide authentication, friend disclosure, content publishing, and other functions used in connection with the Service.
  • “External SNS Provider” means the provider of an External SNS Service.
  • “External SNS Terms” means the terms governing the relationship between a registered user and an External SNS Provider.
  • “Intellectual Property Rights” means copyrights, patent rights, utility model rights, trademark rights, design rights, and other intellectual property rights (including the right to obtain or register such rights).
  • “Company Website” means the website operated by the Company at the domain https://unlockos.io (including any successor website) and any applications released or to be released by the Company.
  • “Company Products” means products required for using the Service (such as UnlockOS-compatible smart locks).
  • “Applicant” has the meaning defined in Article 3.
  • “Registration Information” has the meaning defined in Article 3.
  • “Registered User” means an individual or corporation registered as a user of the Service under Article 3.
  • “Anti-Social Forces” means organized crime groups, their members, related organizations, extortionists, persons subject to anti-money laundering or anti-terrorism regulations, and similar entities.
  • “Laws and Regulations” means statutes, government ordinances, ministerial ordinances, administrative guidance, and other legal norms.
  • “Service” means the UnlockOS platform and smart lock management service provided by the Company (including any renamed or modified version).
  • “Service Agreement” means the collective agreement between the Company and the registered user comprising these Terms and all related rules, regulations, and policies (including the Privacy Policy).

Article 3 – Registration

  1. Any person wishing to use the Service (the “Applicant”) may apply for registration by agreeing to comply with the Service Agreement and providing certain information (the “Registration Information”) to the Company in the manner prescribed by the Company.
  2. Applications must be made by the individual or corporation that will use the Service. Registration by proxy is not permitted unless approved by the Company. Applicants must provide truthful, accurate, and current information.
  3. The Company shall determine whether to approve or deny registration in accordance with its own criteria. If approved, the Company shall notify the Applicant, and registration shall be deemed complete upon such notification.
  4. The Service Agreement shall take effect upon completion of registration, and the registered user shall be entitled to use the Service in the manner prescribed by the Company.
  5. The Company may refuse registration if the Applicant falls under any of the following:
    • There is a risk of violation of the Service Agreement
    • Any Registration Information is false, inaccurate, or incomplete
    • The Applicant has previously had their registration revoked
    • The Applicant is a minor, adult ward, or person under curatorship without appropriate consent
    • The Applicant is an Anti-Social Force
    • The Applicant operates a service identical or similar to the Service
    • The Company otherwise deems registration inappropriate

Article 4 – Changes to Registration Information

Registered users shall promptly notify the Company in the prescribed manner of any changes to their Registration Information and submit any documents requested by the Company.

Article 5 – Password and ID Management

  1. Registered users shall manage and safeguard their passwords and user IDs at their own responsibility and shall not allow third parties to use, lend, transfer, rename, or sell them.
  2. The registered user shall bear all responsibility for any damage resulting from inadequate management, misuse, or unauthorized use of their password or user ID. The Company assumes no liability whatsoever.
  3. Registered users shall immediately notify the Company upon discovering that their password or user ID has been stolen or used by a third party and shall follow the Company's instructions.

Article 6 – Fees and Payment

  1. Registered users shall pay the service fees separately determined by the Company. If the contracted usage quantity changes during a month, fees shall be calculated on a pro-rata daily basis.
  2. Registered users shall pay service fees at the time and by the method specified by the Company. Transfer fees and other payment costs shall be borne by the registered user.
  3. If a registered user fails to make a payment, they shall pay the outstanding balance plus late payment interest at a rate of 14.6% per annum from the due date until payment is completed.
  4. Payments to the Company shall be made by credit card or other payment methods designated by the Company. The Company may outsource payment processing to a third-party payment service provider.

Article 7 – Use of the Service

  1. During the term of the Service Agreement, registered users may use the Service within the scope of the Agreement and in the manner prescribed by the Company.
  2. Registered users shall prepare and maintain, at their own expense and responsibility, all Company Products, computers, software, communication lines, and other equipment and environments necessary to use the Service.
  3. Registered users shall implement security measures appropriate to their usage environment, including protection against computer viruses, unauthorized access, and information leakage, at their own expense and responsibility.

Article 7-bis – External Service Integrations (e.g. Google Calendar)

  1. As an optional feature of the Service, registered users may connect external services (such as Google Calendar) designated by the Company. Activation requires the user's agreement to the third-party provider's terms and completion of an OAuth (or equivalent) authorisation flow.
  2. For Google Calendar, the Company requests only the calendar.events scope and performs exclusively the writing, updating, and deletion of reservation-block events on a single user-selected calendar. The Company does not read calendar contents, enumerate calendars, or write to third-party calendars. See the Google Calendar integration page for details.
  3. If the integration becomes temporarily or permanently unavailable due to third-party-service outage, API changes, or revocation of authorisation, the Company shall not be liable for any resulting damages. The Company shall, however, provide visibility into integration status and a re-authorisation flow in its administrative console.
  4. Registered users may disconnect the integration at any time. The OAuth refresh token stored by the Company will be deleted within 30 days after disconnection.

Article 8 – Prohibited Activities

Registered users shall not engage in any of the following activities when using the Service:

  • Infringing the intellectual property rights, portrait rights, privacy rights, reputation, or other rights or interests of the Company, other registered users, External SNS Providers, or other third parties
  • Activities related to criminal acts or contrary to public order and morals
  • Transmitting obscene information or information harmful to minors
  • Activities that violate Laws and Regulations
  • Transmitting information containing computer viruses or other harmful programs
  • Altering information available through the Service
  • Activities that may interfere with the Company's operation of the Service
  • Direct transactions or solicitation thereof that bypass the Company Website
  • Disclosing or requesting the disclosure of other registered users' personal information
  • Any other activity the Company deems inappropriate

Article 9 – Suspension of the Service

  1. The Company may suspend or interrupt all or part of the Service without prior notice to registered users in any of the following cases:
    • Performing maintenance or inspection of the computer systems related to the Service
    • Computer or communication line outage due to an accident
    • Force majeure events such as fire, power outage, or natural disaster that prevent operation of the Service
    • The Company otherwise deems suspension or interruption necessary
  2. The Company may terminate the Service at its discretion. In such case, the Company shall notify registered users in advance.
  3. The Company shall not be liable for any damages incurred by registered users as a result of measures taken under this Article.

Article 10 – Intellectual Property Rights

  1. All ownership and intellectual property rights related to the Company Website, the Service, and Company Products belong to the Company or its licensors. Registered users shall not engage in any activity that may infringe such rights (including reverse assembly, reverse compilation, and reverse engineering).
  2. The Company may freely use, without charge, any text, images, videos, or other data posted or transmitted by registered users through the Company Website or the Service.

Article 11 – Cancellation of Registration

  1. The Company may temporarily suspend or cancel the registration of any registered user without prior notice if the user falls under any of the following:
    • Violation of any provision of the Service Agreement
    • False Registration Information is discovered
    • Payment suspension or insolvency
    • Association with Anti-Social Forces
    • No use of the Service for six months or more and no response to the Company's communications
    • The Company otherwise deems continued registration inappropriate
  2. If any of the foregoing applies, the registered user shall automatically lose the benefit of time for all debts owed to the Company and shall immediately pay all outstanding obligations.
  3. The Company shall not be liable for any damages incurred by registered users as a result of actions taken under this Article.
  4. Registered users may cancel their registration by notifying the Company in the prescribed manner at least one month in advance.

Article 12 – Disclaimer of Warranties and Limitation of Liability

  1. The Company makes no guarantees that the Company Products, software, or network services related to the Service will operate without interruption or continue to operate properly in the future, and provides no warranty regarding the Service, including fitness for a particular purpose, commercial usefulness, completeness, or continuity.
  2. The Company shall not be liable for any damages suffered by registered users in connection with the Service, including interruption, suspension, termination, or unavailability of the Service, deletion or loss of messages or information, cancellation of registration, or loss of data or equipment damage.
  3. If the Service Agreement constitutes a consumer contract under the Consumer Contract Act, provisions that completely exempt the Company from liability shall not apply. In such cases, the Company shall compensate for ordinary direct damages up to the amount of the Service fees.

Article 13 – Dispute Resolution and Damages

  1. Registered users shall indemnify the Company for any damages caused by violation of the Service Agreement or in connection with the use of the Service.
  2. If a registered user receives a claim from or becomes involved in a dispute with another registered user, External SNS Provider, or other third party in connection with the Service, the user shall immediately notify the Company and shall resolve such claim or dispute at their own expense and responsibility.

Article 14 – Confidentiality

  1. “Confidential Information” means all information relating to the Company's technology, business, finances, organization, and other matters that a registered user has received, been disclosed, or become aware of from the Company in connection with the Service Agreement or the Service, excluding information that is already publicly known or independently developed.
  2. Registered users shall use Confidential Information solely for the purpose of using the Service and shall not provide, disclose, or leak Confidential Information to any third party without the Company's prior written consent.
  3. Confidential Information may be disclosed when required by law, court order, or governmental request.

Article 15 – Term

  1. The Service Agreement shall take effect on the date registration is completed under Article 3, with an initial term of one year. If neither party provides notice of non-renewal at least one month before expiration, the Agreement shall automatically renew on the same terms for successive one-year periods.
  2. Notwithstanding the foregoing, registered users may terminate the Service Agreement at any time with one month's prior notice.

Article 16 – Amendments

The Company may modify the content of the Service at its discretion. If there are reasonable grounds for amending these Terms, the Company may amend the Terms by specifying an effective date and notifying registered users by email, posting on the Company Website, or other means designated by the Company.

Article 17 – Contact and Notices

All inquiries from registered users to the Company regarding the Service and all notices from the Company to registered users, including notices of amendments to these Terms, shall be made by email or other methods designated by the Company.

Article 18 – Assignment

  1. Registered users may not assign, transfer, pledge, or otherwise dispose of their status under the Service Agreement or any rights or obligations arising thereunder to any third party without the Company's prior written consent.
  2. If the Company transfers the business related to the Service to another company, the Company may transfer to the transferee the status, rights, and obligations under the Service Agreement, as well as Registration Information and other customer information.

Article 19 – Entire Agreement

The Service Agreement constitutes the entire agreement between the Company and the registered user regarding the matters contained herein and supersedes all prior agreements, representations, and understandings, whether oral or written.

Article 20 – Severability

If any provision or part thereof of these Terms is determined to be invalid or unenforceable under the Consumer Contract Act or other laws, the remaining provisions shall continue in full force and effect.

Article 21 – Survival

The provisions of Articles 5(2), 6 (to the extent of unpaid amounts), 8(2), 9(3), 10, 11(2)(3)(5), 12 through 14, and 18 through 22 shall survive termination of the Service Agreement; provided that Article 14 shall survive for two years following termination.

Article 22 – Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of Japan. The Tokyo District Court shall have exclusive jurisdiction as the court of first instance for all disputes arising out of or in connection with these Terms.

Article 23 – Good Faith Resolution

The Company and registered users shall endeavor to promptly resolve in good faith any matters not provided for in these Terms or any questions regarding the interpretation of these Terms through mutual consultation.