Terms of Service

Article 1 (Scope)

1. These Terms apply to all relationships between users and the Operator concerning the use of the Service.
2. Guidelines and notices published by the Operator on the Service form part of these Terms.
3. If a separate agreement concerning the Service exists between the Operator and a user or the organization to which the user belongs, that agreement prevails over these Terms.

Article 2 (Definitions)

In these Terms, the following definitions apply.

• "User": any person who uses the Service after agreeing to these Terms
• "User Content": information a user enters, submits, or registers on the Service (including requests to the Built-in AI, programs and other deliverables the Built-in AI creates based on the user's requests, submissions, display name, and profile)
• "Service Content": tasks, passing-criteria tests, grading criteria, learning cards, explanations, learning materials, and any other information the Operator provides on the Service
• "Built-in AI": the artificial intelligence feature built into the Service that creates and explains programs based on a user's requests (using technology from external AI providers selected by the Operator)
• "Paid Plan": the monthly plan and the yearly plan, collectively
• "Free Trial": the scope that can be used without payment, as set out in Article 6, Paragraph 5
• "Usage Limit": the daily and monthly limits on use of the Built-in AI

Article 3 (Account Registration)

1. Some features of the Service require an account. Applicants must register with true and accurate information.
2. The Operator may refuse registration if false information is provided, if the applicant has previously violated these Terms, or if the Operator otherwise deems the registration inappropriate.
3. Users must promptly update their registered information whenever it changes.

Article 4 (Account Management)

1. Users are responsible for managing their credentials, such as passwords, and must not lend or share them with third parties.
2. Any action performed using a user's credentials is deemed an action of that user.
3. Users must promptly notify the Operator if they suspect unauthorized use of their account.

Article 5 (Use by Minors)

Minors must use the Service with the consent of a parent or other legal guardian. When a minor uses the Service, such consent is deemed to have been obtained.

Article 6 (Fees, Payment, and Cancellation)

1. The fees for the Paid Plan are 10,000 JPY per month (tax included) for the monthly plan and 100,000 JPY per year (tax included) for the yearly plan. The fees and what they include are shown on the Service's pricing page.
2. The Paid Plan renews automatically on the same terms unless the user cancels: every month for the monthly plan and every year for the yearly plan, counted from the date of application. The renewal date is the same day as the date of application.
3. At least 7 days before the renewal date of a yearly plan, the Operator will send a renewal notice to the registered email address.
4. Fees are paid in advance by credit card through a payment processor designated by the Operator. The first charge is made at the time of application, and later charges are made on each renewal date.
5. Users may cancel at any time from the Service's settings screen. After cancellation, the user may continue to use the Service until the end of the period already paid for, and no further fees will be charged. Cancelling in the middle of a month on the monthly plan, or in the middle of a year on the yearly plan, does not entitle the user to a prorated or any other refund. This does not apply if the Operator was unable to provide the Service for reasons attributable to the Operator.
6. The Operator provides the first 3 tasks the user uses free of charge to users who have not applied for the Paid Plan. The scope available free of charge is set by the Operator on the Service. No payment information is required to use it. The Free Trial never converts to a Paid Plan automatically.
7. If the Operator changes the fee, it will announce the change at least 30 days before the effective date by notice to the registered email address and by posting on the Service. The new fee applies from the first renewal date on or after the effective date. A user who does not agree to the change may cancel by the day before that renewal date. Fees for periods already paid will not change.
8. If payment is not completed on the renewal date, the Operator may notify the user and retry the payment. If payment remains incomplete, the Operator may suspend the Paid Plan and terminate the contract. The user remains obliged to pay any unpaid fees. When the user completes payment, the Operator will resume the Service.
9. A Paid Plan contract is formed when the user completes the application procedure and payment is completed. The Operator starts providing the Service immediately after payment is completed.

Article 6-2 (Use of the Built-in AI)

1. Output from the Built-in AI (programs created, explanations, suggestions, etc.) is not guaranteed to be accurate, complete, safe, or fit for any particular purpose. The Service is intended for learning; if a user uses any output in actual work, the user is responsible for reviewing it.
2. Requests to the Built-in AI and related information are sent to external AI providers selected by the Operator in order to provide the Built-in AI feature, and are processed in accordance with those providers' terms (the recipients are listed in the Privacy Policy).
3. Users must not enter into the Built-in AI confidential information of their employer or others, personal information of third parties, or any other information that is inappropriate to transmit.
4. Use of the Built-in AI is subject to daily and monthly usage limits. The limits for users who have not applied for the Paid Plan are set lower than those for Paid Plan users. The specific limits are shown on the pricing page and elsewhere on the Service. When a limit is reached, the Built-in AI may be unavailable until the next day (daily limit) or the next month (monthly limit). Reaching a limit does not entitle the user to a fee reduction or refund.
5. The Operator claims no rights in deliverables the Built-in AI creates based on a user's requests. This does not apply to rights in the Service Content (tasks, passing-criteria tests, etc.).
6. To keep the Built-in AI stable, the Operator may review the usage limits. If a change would disadvantage users, the Operator will notify users on the Service in advance.

Article 7 (Intellectual Property)

1. All intellectual property rights in the Service and the Service Content belong to the Operator or their rightful owners. The license to use the Service under these Terms does not transfer any of these rights.
2. Users may use the Service Content only to the extent necessary to use the Service, and must not copy, republish, redistribute, or sell task descriptions, passing-criteria tests, grading criteria, learning cards, or other materials without the Operator's permission.

Article 8 (User Content)

1. Copyright in User Content, such as submitted source code, remains with the user.
2. Users grant the Operator a royalty-free license to use User Content (including copying, executing, analyzing, and displaying it) for providing the Built-in AI feature, grading and evaluation, displaying results, investigating defects, and improving the quality of the Service.
3. Systems a user creates and their submission results are made public to other users and visitors only if the user chooses to publish them to the Gallery. What is published is limited to the content shown at the time of publishing (the files created, a summary of the results, a summary of the Built-in AI's work, the display name, and any description the user enters), and the user may unpublish at any time.
4. Features such as the League (weekly rankings) and learning records display the user's display name, XP earned, a summary of results for tasks attempted, and similar information to other users and visitors.
5. The Operator may remove User Content that violates laws or these Terms without prior notice.

Article 9 (Prohibited Conduct)

Users must not engage in any of the following when using the Service.

• Conduct that violates laws or public order and morals, or that is connected to criminal activity
• Conduct that infringes the intellectual property, privacy, or other rights or interests of the Operator or third parties
• Unauthorized access, probing or exploiting vulnerabilities, or attempting to escape the code execution environment (sandbox)
• Improperly obtaining grading details (such as non-public checks), falsifying results, or otherwise circumventing or deceiving the grading mechanism
• Using the Built-in AI for purposes other than learning on the Service (such as mass generation or use aimed at repurposing output for other services), or attempting to circumvent the safety measures of the Built-in AI or the execution environment
• Using the Built-in AI to create programs or other deliverables that violate laws or infringe the rights of third parties
• Impersonating others, or transferring, lending, or sharing an account
• Mass access or scraping by automated means, or any other conduct that places an excessive load on the Service
• Conduct that interferes with the operation of the Service
• Improperly collecting information about other users
• Providing benefits to or otherwise cooperating with antisocial forces
• Any other conduct the Operator reasonably deems inappropriate

Article 10 (Suspension and Termination of Accounts)

1. If a user violates or is likely to violate these Terms, the Operator may, without prior notice, remove User Content, restrict use of the Service, or suspend or delete the user's account.
2. The Operator is not liable for any damage arising from such measures, except in cases of willful misconduct or gross negligence by the Operator.

Article 11 (Withdrawal)

Users may withdraw from the Service at any time through the procedure specified by the Operator. Users with an active paid plan who withdraw must also complete the cancellation procedure (Article 6, Paragraph 4). Cancellation can be done from the Service's settings screen. Fees already paid are not refunded upon withdrawal.

Article 12 (Changes, Interruption, and Termination of the Service)

1. The Operator may change or add to the Service at any time, and will endeavor to give advance notice of significant changes.
2. The Operator may temporarily suspend the Service for maintenance, system failure, natural disaster, or other unavoidable reasons.
3. If the Operator terminates the Service, it will in principle give advance notice within a reasonable period.

Article 13 (Disclaimer of Warranties and Limitation of Liability)

1. The Operator does not warrant that the Service is free of de facto or legal defects, including defects relating to safety, accuracy, completeness, usefulness, or fitness for a particular purpose.
2. The Operator is not liable for any damage users incur through use of the Service, except in cases of willful misconduct or gross negligence by the Operator.
3. Even where the Operator is liable, its liability is limited to direct damages that would ordinarily arise, and is capped at the total fees the Operator received from the user in the preceding 12 months for paid-plan users, or 5,000 JPY for users who have not paid any fees (including users in a trial period). This cap does not apply in cases of willful misconduct or gross negligence by the Operator.
4. Nothing in this Article limits the application of the Consumer Contract Act of Japan or other mandatory laws, and this Article does not apply to the extent it would be invalid under such laws.
5. Users must resolve any dispute with a third party concerning the Service at their own responsibility and expense.

Article 14 (Exclusion of Antisocial Forces)

Users represent and warrant that they are not members of organized crime groups or other antisocial forces, and that they have no relationship with such parties.

Article 15 (Amendments to These Terms)

1. The Operator may amend these Terms pursuant to Article 548-4 of the Civil Code of Japan when the amendment is in the general interest of users, or when it does not conflict with the purpose of the contract and is reasonable in light of its necessity and appropriateness.
2. When amending these Terms, the Operator will set an effective date and announce the amended terms and the effective date in advance by posting on the Service or by other appropriate means.

Article 16 (Communications and Notices)

1. Notices from the Operator to users are given by posting on the Service or by sending to the registered email address, and are deemed received at the time they would ordinarily arrive.
2. Communications from users to the Operator must be made through the Service's contact form.

Article 17 (Assignment of Rights and Obligations)

1. Users may not assign or pledge their position or any rights or obligations under these Terms to third parties without the Operator's prior written consent.
2. If the Operator transfers the business relating to the Service to a third party, the Operator may transfer its position under these Terms, its rights and obligations, and registered and other user information to the transferee, and users consent to this in advance.

Article 18 (Severability)

If any provision of these Terms is held invalid or unenforceable under applicable law, the remaining provisions remain in full force and effect.

Article 19 (Governing Law and Jurisdiction)

These Terms are governed by and construed in accordance with the laws of Japan. The Tokyo District Court has exclusive jurisdiction as the court of first instance over any dispute concerning the Service.