Terms of Service

Terms of Service for NIHONGO-AI. Please read carefully before using our service.

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⚠️ Important Notice (Required Reading)

This service is a learning support tool and does not guarantee any results.

All content and features are provided 'as is' and users agree to use them at their own risk.

Users understand that they must critically verify provided information and make final judgments themselves.

Article 1 (Definitions & Scope)

1. These terms apply to all services provided by NIHONGO-AI (the 'Company') (the 'Service').

2. 'Users' refers to all individuals or entities using this service.

3. 'Content' refers to all information including text, images, audio, video, programs, etc.

4. If you cannot agree to these terms, please stop using this service immediately.

Article 2 (Registration & Account Management)

1. Registration is completed only when approved by the Company, and we have no obligation to explain approval decisions.

2. We will refuse or delete registration in the following cases:

  • Providing false information
  • History of terms violations
  • Connection to antisocial forces
  • Other cases deemed inappropriate by the Company

3. Account management is entirely the user's responsibility, and we will not compensate for damages from unauthorized use.

Article 3 (Strict Prohibitions)

The following actions will result in immediate account deletion:

  • All illegal activities
  • Harassment or defamation of others
  • Intellectual property infringement
  • Unauthorized access or attacks on systems
  • Massive access or scraping
  • Account sharing or reselling
  • Using service for competitive research
  • Business interference
  • Reverse engineering of the service
  • Spreading false information
  • Commercial use (without explicit permission)

Article 4 (Complete Billing Exemption)

1. Prices may change without advance notice, and we have no obligation to notify existing users individually.

2. No refunds after payment completion, except when our gross negligence is clearly proven.

3. For billing errors or duplicate charges, we have no investigation or refund obligations unless proven by users.

4. Services may be suspended without notice for payment delays/failures, and we will not compensate for recovery losses.

5. All taxes and fees are the user's responsibility.

⚠️ Important Notes on Plan Changes & Upgrades

Proration (Differential Billing) System

  • When upgrading a plan, the difference between the old and new plan for the remaining days of the current billing period will be immediately charged on a pro-rata basis.
  • Billing occurs immediately upon confirmation on the confirmation screen and cannot be canceled.
  • The new plan's monthly fee will apply from the next renewal date.
  • No refunds will be given for plan downgrades. The new plan will apply at the next renewal.
  • Even if there is an error in the differential calculation during an upgrade, no refund or adjustment will be made unless clearly proven by the user.

Principle of Immediate Application

Plan changes are applied immediately upon completion of payment, and the new plan's features and limits become effective instantly. No cancellations or refunds will be made for delays in application due to system failures, etc.

Article 5 (Service Content & Availability Exemption)

Complete Exemption Clause

1. This service is provided 'as is' without any guarantee of availability, accuracy, or completeness.

2. We do not guarantee learning outcomes, qualification success, employment success, etc., and will not compensate for disappointing results.

3. We are not responsible for AI response accuracy or translation quality; users must verify content.

4. We will not compensate for losses from server failures, maintenance, or external factors.

5. We are not responsible for impacts from third-party services (Stripe, etc.).

6. Blog articles and content are reference information; we do not guarantee practicality or accuracy.

Article 6 (Intellectual Property & Usage Restrictions)

1. All intellectual property rights of this service belong to the Company; users are only granted usage rights.

2. Copying, reproducing, or secondary use of content is prohibited except for personal learning purposes.

3. Legal action and damage claims will be pursued for violations.

4. We own rights to AI-generated content, and commercial use is prohibited.

Article 7 (User Data & Privacy)

1. User data handling is defined in our separate Privacy Policy.

2. Responsibility for data loss or leaks is limited to legal minimums; emotional damages are not compensated.

3. No data recovery will be performed upon account deletion.

4. Backing up learning history and settings is the user's responsibility.

Article 8 (Cancellation & Account Deletion)

1. Users may cancel at any time, but no refunds for paid periods.

2. The Company may terminate service for any reason with 30 days' notice.

3. Accounts will be immediately deleted for terms violations; appeals will not be accepted.

4. No data recovery or refund requests will be honored after deletion.

Article 9 (Damage Compensation & Liability Limitation)

Complete Limitation of Damage Compensation

1. Our damage compensation liability is limited to the usage fee for the month when damage occurred.

2. Lost profits, emotional damages, indirect damages, special damages, and derivative damages are not compensated.

3. Even for failures affecting multiple users, individual damage compensation will not exceed the above limit.

4. Legal claims must be made within 6 months of damage recognition and within 1 year of occurrence.

5. We bear no responsibility unless our intent or gross negligence is proven.

Article 10 (Terms Changes & Notifications)

1. These terms may be changed at our discretion at any time and take effect immediately upon change.

2. Important changes will be notified via website posting; we have no individual notification obligations.

3. If you cannot agree to changes, you must stop using the service; continued use constitutes agreement to changes.

Article 11 (Severability & Governing Law)

1. If any part of these terms becomes invalid, the effectiveness of other provisions is maintained.

2. Japanese law governs these terms, and Chiba District Court has exclusive jurisdiction.

3. International disputes will also be resolved exclusively under Japanese law and Japanese courts.

Important Message to Users

This service is a learning support tool. Please treat provided information and features as reference only and always verify content with a critical perspective.

AI and translation features are not perfect. For important decisions, we strongly recommend consulting multiple information sources and experts.

Learning outcomes greatly depend on individual effort, ability, and environment. Using this service alone may not achieve expected results.

Established: January 28, 2025

Last Updated: January 28, 2025

Operator: Natsuki Yamashita (NIHONGO-AI)