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Terms of Service

Last updated: October 29, 2026
October 29, 2026 — Added provisions on payment for the Paid Plan (Article 4).

This English version is provided for reference only. If there is any discrepancy between the Japanese and English versions, the Japanese version shall prevail. 日本語版はこちら

Article 1 (Application of Terms)

These Terms of Service govern the use of the Google Workspace™ add-on "NMai Intelligence Fortress" (the "Service") provided by TSUKIWA Inc. (the "Company").

By installing or using the Service, users are deemed to have agreed to these Terms.

Article 2 (Definition of Features)

The Service provides the following features:

  1. Core Kernel
    A setting where users describe background information the AI should always keep in mind, such as their business, role, and terminology. This information is included with every request so that responses stay consistent.
  2. Prompt Checker (CK)
    A feature that detects terms registered in advance by the user and removes or masks them before they are sent to external AI models. For attached PDFs and images, this applies to text recognized through optical character recognition (OCR), to the extent it can be detected.
  3. Rinc / Deep Rinc
    A memory feature that generates and keeps dialogue summaries (REF Cards) and loads them at startup to continue past context, and a feature that searches and recalls past memories as needed.

Article 3 (Plans and Handling of Memory Data)

  1. The Service offers a "Free Plan" and a "Paid Plan."
  2. Restrictions under the Free Plan
    Memory data older than 90 days from creation is restricted from search and recall.
  3. Data retention
    Memory data (REF Cards) is not automatically deleted. The data remains stored, and it becomes available again upon upgrading to the Paid Plan. The Company will delete memory data only at the user's request, in accordance with Article 9 of the Privacy Policy.
  4. Usage limits
    Both the Free Plan and the Paid Plan are subject to daily usage limits. The applicable limits are displayed within the Service, and the Company may change them as necessary.

Article 4 (Fees and Payment)

  1. The fee for the Paid Plan is JPY 1,980 per month (tax included; JPY 1,800 plus 10% Japanese consumption tax).
  2. Payment shall be made by credit card or any other method designated by the Company. The first payment is charged at the time of application, and subsequent payments are charged automatically on each renewal date.
  3. Payment processor
    Payment is processed on a checkout page provided by Stripe Japan, Inc. ("Stripe"), the payment processor engaged by the Company. Users move from the plan selection screen of the Service to Stripe's checkout page and enter their payment details on that page. The Company does not collect or store credit card numbers or other payment details. For how Stripe handles personal information, please see Articles 2 and 10 of our Privacy Policy.
  4. If payment fails
    If payment cannot be completed, for example because a card has expired, the Company may suspend the features of the Paid Plan. Even in that case, the Company does not delete memory data. As set out in Article 3(3), the data is retained and becomes available again once payment resumes.
  5. The Company may revise the fee due to changes in economic conditions, consumption tax rates, costs of providing the Service, or other reasons. In such cases, the Company will notify users at least 30 days before the revision.
  6. The revised fee applies from the first renewal date after the notice. Users who do not agree to the revision should cancel by the day before the renewal date.
  7. For details, please see the Seller Information page.

Article 5 (Cancellation and Refunds)

  1. Users may cancel the Paid Plan at any time.
  2. After cancellation, users may continue to use the Paid Plan until the end of the period already paid for. No charges will be made from the next renewal date.
  3. Due to the nature of digital services, payments are, in principle, non-refundable once completed. However, this does not apply where the Company is unable to provide the Service for reasons attributable to the Company.

Article 6 (Prohibited Conduct)

Users shall not engage in any of the following when using the Service:

  1. Unauthorized access to, reverse engineering of, or placing excessive load on the Service's infrastructure, programs, or databases
  2. Any intentional attempt to bypass or disable the detection and control functions of the Prompt Checker (CK)
  3. Any act that infringes the rights of the Company or third parties
  4. Any act that violates applicable laws and regulations

Article 7 (Modification and Termination of the Service)

  1. The Company may modify the contents of the Service or terminate its provision.
  2. If the Company terminates the Service, it will notify users at least 30 days before the termination date.
  3. Users may export their data before the termination date. To request an export, please contact support@tsukiwa.co.jp.

Article 8 (Termination of Use and Handling of Data)

  1. Users may stop using the Service at any time by uninstalling the add-on.
  2. To request deletion of data after termination of use, please contact support@tsukiwa.co.jp. Requests will be handled in accordance with Article 9 of the Privacy Policy.

Article 9 (Disclaimers)

  1. The Company makes no warranties regarding the accuracy, completeness, usefulness, or fitness for a particular purpose of outputs generated by AI models.
  2. Whether and how to use the outputs of the Service is solely at the user's discretion and responsibility.
  3. The Company accepts no liability for damages arising from force majeure, telecommunications failures, or outages of external cloud services.

Article 10 (Governing Law and Jurisdiction)

  1. These Terms shall be governed by and construed in accordance with the laws of Japan.
  2. Any dispute arising out of or in connection with the Service shall be subject to the exclusive jurisdiction of the Chiba District Court as the court of first instance.

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