Terms of Service

Article 1 (Application)

These Terms apply to all relationships between Users and the Operator concerning the use of the Service.

Any rules or guidelines regarding use that the Operator posts on the Service from time to time form part of these Terms. If such rules conflict with these Terms, these Terms prevail unless otherwise specified.

Article 2 (Definitions)

The terms used in these Terms are defined as follows.

• "Service" means the conversation practice service provided by the Operator under the name "RenAI," including related websites and applications.
• "User" means an individual who agrees to these Terms and uses the Service.
• "Account" means the right, issued to identify a User, that is required to use the Service.
• "Content" means text, audio, video, and other information, including information that a User inputs or submits to the Service and information generated by the Service.

Article 3 (Registration)

A person who wishes to use the Service applies for registration by the method prescribed by the Operator after agreeing to these Terms, and registration is completed when the Operator approves the application.

When registering, the User shall provide accurate and up-to-date registration information such as a display name, user ID, email address, and password. Authentication uses an external authentication platform (Firebase Authentication), and passwords are managed by that platform.

The Operator may decline an application for registration if it determines that any of the following apply, and bears no obligation to disclose the reason.

• The applicant provided false information.
• The application is from a person who has previously violated these Terms.
• The Operator otherwise determines that the registration is not appropriate.

Article 4 (Account Management)

The User shall appropriately manage their Account and login information at their own responsibility.

The User shall not allow any third party to use, lend, transfer, change the name of, or trade their login information.

The User bears responsibility for any damage arising from inadequate management of login information, errors in use, or use by a third party, and the Operator bears no responsibility for such damage.

Article 5 (Content of the Service)

The Service provides features such as text and voice conversations with virtual characters, generation and display of feedback on those conversations, score recording, and rankings.

The generation of conversations and feedback, speech synthesis, and speech recognition (transcription) in the Service use artificial intelligence (AI) and external cloud services. Please refer to the separately established Privacy Policy for details of this processing and for the handling of the information collected and used.

Conversations, feedback, scores, and the like generated by the Service are produced automatically by AI, and the Operator does not guarantee their accuracy, usefulness, or fitness for a particular purpose.

Article 6 (Fees)

The Service is currently provided free of charge. However, the communication costs and the cost of devices and equipment required to use the Service are borne by the User.

The Operator may, in the future, charge for all or part of the Service. If the Operator introduces fees, it will clearly state the fees, payment methods, and other conditions on the Service in advance, and the use of paid features will require the User's separate consent.

Article 7 (Use of Camera and Microphone; Recording and Analysis)

Some features of the Service use the camera and microphone of the User's device. For conversation practice, the Service collects and analyzes features such as facial expression, gaze, voice volume, and speaking pace from the User's camera and microphone, and uses them to generate feedback.

Only when the User consents to recording, the Service records a video that combines the avatar with the User's camera video and audio, and uses it to improve the Service and to create and improve machine learning models. The conversation features of the Service remain available even if the User does not consent to recording.

The collection, use, storage, and disclosure of this data to third parties are governed by the Privacy Policy. The User shall take care to ensure that no third party is included in the location of use or the recording range.

Article 8 (Prohibited Conduct)

In using the Service, the User shall not engage in any of the following acts.

• Acts that violate laws and regulations or public order and morals
• Acts related to criminal activity
• Acts that infringe the intellectual property rights, portrait rights, privacy, reputation, or other rights or interests of the Operator, other Users, or third parties
• Acts that destroy or interfere with the functions of the Service's servers or network
• Acts that may interfere with the operation of the Service
• Unauthorized access or attempts thereof
• Improperly collecting personal information about other Users
• Using Content obtained through the Service beyond the scope permitted by these Terms
• Using the Service for the purpose of obtaining an improper benefit for oneself or a third party
• Directly or indirectly providing benefits to antisocial forces
• Other acts that the Operator deems inappropriate

Article 9 (Suspension of the Service)

The Operator may suspend or interrupt all or part of the Service without prior notice to Users if any of the following applies.

• When performing maintenance, inspection, or updates of the systems for the Service
• When provision of the Service becomes difficult due to force majeure such as earthquake, lightning, fire, power outage, or natural disaster
• When computers or communication lines stop due to an accident
• When a failure of an external service occurs, or the Operator otherwise determines that provision of the Service is difficult

Article 10 (Usage Restrictions and Deregistration)

The Operator may, without prior notice, restrict a User's use of all or part of the Service or delete the User's Account if the User falls under any of the following.

• The User violates any provision of these Terms.
• It becomes clear that there is a false fact in the registration information.
• There is no response from the User to communications from the Operator for a certain period.
• The Operator otherwise determines that use of the Service is inappropriate.

Article 11 (Withdrawal)

The User may withdraw from the Service and delete their Account at any time by the method prescribed by the Operator. The handling of data upon withdrawal is governed by the Privacy Policy.

Article 12 (Intellectual Property Rights)

Intellectual property rights in the Service and the Content provided in connection with the Service (characters, images, text, programs, etc.) belong to the Operator or the rightful right holders. The license to use the Service under these Terms does not mean an assignment or license of these intellectual property rights.

Rights in the Content that a User inputs or submits to the Service belong to the User. However, the User grants the Operator a license to use such Content to the extent necessary for providing and improving the Service and for creating and improving machine learning models. The scope of use is governed by the Privacy Policy.

Article 13 (Disclaimer of Warranties)

The Operator does not expressly or impliedly warrant that the Service is free from defects in fact or in law (including defects related to safety, reliability, accuracy, completeness, validity, fitness for a particular purpose, and security, as well as errors, bugs, and infringements of rights).

Conversations, feedback, scores, and the like provided by the Service are generated automatically by AI, and the Operator does not warrant their accuracy or usefulness. The Service is not a substitute for professional advice such as medical, psychological, or legal advice; please consult a professional for important decisions.

Except in cases of the Operator's willful misconduct or gross negligence, the Operator bears no responsibility for any damage to Users arising from the Service.

Article 14 (Limitation of Liability)

Notwithstanding the preceding article, even where the Operator bears liability for damages to a User due to the application of the Consumer Contract Act or other mandatory laws, except in cases of the Operator's willful misconduct or gross negligence, the Operator's liability is limited to ordinary and direct damages actually incurred by the User, and the Operator bears no liability for damages arising from special circumstances (regardless of foreseeability of the occurrence of damages).

Article 15 (Changes to the Service)

The Operator may, with prior notice to Users, change the content of the Service or terminate provision of the Service. Except as provided in these Terms, the Operator bears no responsibility for damage to Users arising therefrom.

Article 16 (Changes to These Terms)

The Operator may change these Terms in accordance with laws and regulations when it determines it necessary. When changing these Terms, the Operator will notify Users of the content of the revised Terms and the time at which they take effect, by posting on the Service or other appropriate means.

If a User uses the Service after the revised Terms take effect, the User is deemed to have agreed to the revised Terms.

Article 17 (Handling of Personal Information)

The Operator will appropriately handle Users' personal information and usage data collected through use of the Service in accordance with the separately established Privacy Policy.

Article 18 (Governing Law and Jurisdiction)

These Terms are governed by and construed in accordance with the laws of Japan.

In the event of a dispute between a User and the Operator regarding the Service, the Tokyo District Court shall be the court of exclusive agreed jurisdiction for the first instance.

Article 19 (Contact)

For inquiries regarding these Terms, please contact us at the following.

Operator: Kotaro Ueda (sole proprietor)

Contact: official@chofurenai.com (X: @chofu_renai)

Supplementary Provisions

• Effective date: June 5, 2026