# Terms of Service

Last Updated: January 21, 2026

## Article 1 (Purpose)
These Terms of Service (hereinafter referred to as the "Terms") set forth the terms and conditions for the use of the CLI-based note-taking application and cloud synchronization service known as "Risu Note" (hereinafter referred to as the "Service") provided by Laiosys (hereinafter referred to as "we," "us," or "our"). Users shall use the Service upon agreeing to these Terms.

## Article 2 (Definitions)
The definitions of terms used in these Terms are as follows:

1.  "User" means an individual or legal entity that uses the Service provided by us upon agreeing to these Terms.
2.  "Service" means the CLI-based note-taking application and the accompanying cloud synchronization service provided by us.
3.  "Local Data" means note data and other information saved on the User's terminal.
4.  "Cloud Data" means Local Data and its synchronization information saved on the server with the User's consent through the cloud synchronization function of the Service.
5.  "E2E Encryption" stands for End-to-End Encryption, an encryption method where data is encrypted before being sent from the User's terminal and can only be decrypted on the User's terminal.
6.  "Passphrase" means a secret string of characters set by the User to decrypt E2E encrypted data.

## Article 3 (Use of the Service)
1.  Users shall use the Service in accordance with these Terms and the Privacy Policy separately prescribed by us.
2.  The Service operates on the terminal of the User's PC (macOS, Linux, Windows, etc.). Users shall prepare the necessary hardware, software, communication environment, etc., for using the Service at their own responsibility.

## Article 4 (Account Registration)
1.  To use the Pro Plan of the Service, account registration using Google Authentication (Firebase Auth) is required.
2.  Users shall provide accurate and up-to-date information as registration information.
3.  Users shall strictly manage their account information and shall not transfer, lend, or change the name of the account to a third party.
4.  Users shall immediately notify us if leakage of account information or unauthorized use by a third party occurs.

## Article 5 (Fees and Payment Methods)
1.  The Service is provided under a freemium model.
    1.  Free Plan: Provides local storage-only functions, and the usage fee is free.
    2.  Pro Plan: Provides additional functions such as cloud synchronization, and monthly or annual usage fees apply.
2.  The usage fees for the Pro Plan shall be in accordance with the fee schedule separately prescribed by us.
3.  Payment of usage fees for the Pro Plan shall be made through a payment service provider (Stripe) designated by us. Users shall also agree to the terms of service of the payment service provider.
4.  Users shall provide accurate payment information, such as credit card information, to us and the payment service provider.
5.  The usage period for the Pro Plan shall be one month or one year from the application date or renewal date, and shall be automatically renewed upon expiration with the User's consent.

## Article 6 (Passphrase Management and Disclaimer for Data Recovery)
1.  The Service adopts E2E Encryption, and the User's Passphrase is managed only within the User's terminal. We do not have any means to know the Passphrase or to decrypt the data. Only encrypted data is sent to the server.
2.  Users shall bear the responsibility for managing their own Passphrases.
3.  If a User loses their Passphrase, we cannot recover the User's data by any means.
4.  We shall not be liable for any data loss due to a forgotten Passphrase. Users shall strictly manage their Passphrases at their own responsibility and take care not to lose them.

## Article 7 (Data Ownership and Backup)
1.  Intellectual property rights of note data, etc., belong to the User.
2.  The Service operates on a local-first basis (the User's PC is the primary source of data). The cloud is provided for synchronization purposes.
3.  Users shall manage backups of Local Data at their own responsibility in preparation for data loss on the cloud (including but not limited to server failures, system errors, etc.). We shall not be liable for any damages caused to the User due to data loss on the cloud.

## Article 8 (Prohibited Acts)
Users shall not engage in the following acts when using the Service:

1.  Saving or synchronizing illegal data, malware, content infringing copyright, content contrary to public order and morals, etc., even if the data is E2E encrypted.
2.  Acts that interfere with or may interfere with the operation of the Service.
3.  Acts that infringe on the intellectual property rights, privacy rights, portrait rights, or other rights or interests of a third party.
4.  Acts that violate laws and regulations or public order and morals.
5.  Other acts that we deem inappropriate.

## Article 9 (Account Suspension and Metadata Disclosure)
1.  We may temporarily suspend or permanently suspend (freeze) the use of an account without prior notice to the User if the User violates the prohibited acts set forth in the preceding Article or is suspected of doing so.
2.  We may disclose User account information (limited to metadata such as login history and IP address; excluding the content of encrypted data) based on laws and regulations or upon a lawful and valid request from law enforcement agencies.

## Article 10 (Payment, Cancellation, and Refund)
1.  Usage fees for the Pro Plan shall be incurred at the start of the usage period.
2.  Even if the Pro Plan is canceled during the usage period, no prorated refund will be made, and the functions of the Pro Plan will be available until the expiration date of the usage period.
3.  If payment of usage fees is delayed, we may suspend the provision of the cloud synchronization function of the Pro Plan and downgrade it to functions equivalent to the Free Plan without prior notice to the User.
4.  We may freeze or delete the account if the User's payment delay is not resolved.

## Article 11 (Service Interruption, Termination, and Nature of Beta Version)
1.  The Service is developed by an individual or a small group, and due to its nature as a CLI tool, it may unexpectedly cease to operate due to OS updates, etc.
2.  The Service may currently be provided as an Early Access version or v1.0, and may contain unexpected bugs (provided "As-Is"). We do not guarantee the complete operation of the Service.
3.  We may temporarily interrupt or terminate the provision of the Service without prior notice to the User if it becomes difficult to provide the Service due to natural disasters, accidents, or other emergencies.
4.  If we terminate the provision of the Service, we shall notify Users with a certain notice period. Even after the termination of the Service, Users can continue to use data saved locally, but the cloud synchronization function will no longer be available.
5.  We shall not be liable for any damages caused to Users due to interruption, termination, or modification of the provision of the Service.

## Article 12 (Intellectual Property Rights)
All copyrights, patent rights, trademark rights, know-how, and other intellectual property rights related to the Service belong to us or third parties who have granted rights to us.

## Article 13 (Handling of Personal Information)
We shall appropriately handle personal information of Users acquired in connection with the use of the Service in accordance with our Privacy Policy.

## Article 14 (Disclaimer)
1.  We do not guarantee that the Service fits the specific purpose of the User, has the expected functions, commercial value, accuracy, or usefulness, is useful to the User, or produces the expected effect for the User.
2.  We shall not be liable for any damages caused to the User arising from the Service, except in cases of our willful misconduct or gross negligence.
3.  If a User causes damage to a third party or a dispute arises with a third party in connection with the Service, the User shall resolve it at their own responsibility and expense, and we shall not bear any responsibility.

## Article 15 (Modification of Terms)
1.  We may modify these Terms at any time without notifying Users if we deem it necessary.
2.  Unless otherwise specified by us, the modified Terms shall take effect upon being posted on our website, etc.
3.  If a User continues to use the Service after the modification of these Terms, the User shall be deemed to have agreed to the modified Terms.

## Article 16 (Governing Law and Jurisdiction)
1.  The interpretation of these Terms shall be governed by the laws of Japan.
2.  In the event of a dispute regarding the Service, the district court or summary court having jurisdiction over the location of our business office shall be the exclusive agreed court of first instance.
