Terms of Service

Last Updated: December 1, 2025

1. Acceptance of Terms

Welcome to ClassHub / クラスハブ ("ClassHub," "we," "us," or "our"). By accessing or using our scheduling and student management software available at https://kurasu.app (the "Service"), you agree to be bound by these Terms of Service ("Terms").

If you are using the Service on behalf of an organization (such as a school or educational institution), you represent that you have the authority to bind that organization to these Terms, and "you" refers to both you individually and the organization.

If you do not agree to these Terms, do not use the Service.

2. Eligibility and Geographic Restrictions

2.1 Eligible Users

The Service is intended for use by:

• Schools, tutoring centers, training studios, and independent teaching and instructing businesses
• School administrators, owners, and authorized staff members
• Organizations located in Japan, North America, and select Asia-Pacific regions

2.2 Geographic Restrictions

This Service is not available to organizations or users:

• Located in the European Economic Area (EEA)
• Located in the United Kingdom
• Operating from the EEA or UK
• Primarily serving customers in the EEA or UK

By using the Service, you represent and warrant that you meet these eligibility requirements and are not located in, operating from, or primarily serving customers in the EEA or UK.

2.3 Age Requirement

You must be at least 18 years old to create an account and use the Service. The Service is a business-to-business (B2B) platform and is not intended for direct use by minors.

3. Account Registration and Security

3.1 Account Creation

To use the Service, you must create an account by providing accurate and complete information, including:

• Organization name
• Contact name and email address
• Billing Information (after free trial)

3.2 Account Security

You are responsible for:

• Maintaining the confidentiality of your account credentials
• All activities that occur under your account
• Notifying us immediately of any unauthorized access or security breach
• Ensuring that all staff members with access to your account comply with these Terms

3.3 Account Information

You agree to provide accurate, current, and complete information and to update this information as necessary to keep it accurate, current, and complete.

4. Free Trial

4.1 Trial Period

We offer the following free trial periods:

• Instructor Plan: 14 days
• Studio Plan: 30 days
• Network Plan: 30 days

4.2 Trial Limitations

During the trial period, you have access to all features of your selected plan. We reserve the right to limit trial access in cases of suspected abuse.

4.3 After Trial Ends

When your trial period ends:

• Your account will be suspended until you subscribe to a paid plan
• Your data will be retained for 30 days to allow you to subscribe
• If you do not subscribe within 30 days, your data will be permanently deleted

5. Subscription Plans and Payment

5.1 Plan Selection

After your free trial, you may choose from the following subscription plans:

• Instructor: ¥4,900/month or ¥49,000/year
• Studio: ¥9,900/month or ¥99,000/year
• Network: ¥19,800/month or ¥198,000/year

5.2 Billing Cycle

Monthly Plans:

• Invoices are issued at the beginning of each month for the following month's service
• For example, you will receive an October invoice (due October 31) that covers your November service
• Payment is due by the last day of the current month
• Mid-month starts are prorated automatically

Annual Plans:

• Payment is due in full at the start of your annual subscription
• We will send an invoice 30 days before the end of your annual period for renewal

5.3 Payment Methods

We accept the following payment methods:

• Bank transfer

5.4 Subscription Renewal

Unless you submit a cancellation or non-renewal request according to the deadlines in Section 6.1, your subscription will continue and we will send you an invoice at the beginning of each billing period.

5.5 Price Changes

We reserve the right to change our pricing. If we change the price of your subscription plan, we will provide at least 30 days' notice before the change takes effect. The new price will apply to your next billing cycle after the notice period.

Price changes do not affect amounts already paid. For annual subscriptions, the original price remains in effect for the entire prepaid period.

5.6 Late Payment

If an invoice is not paid by the due date:

• We will send reminder emails at 7 days and 14 days overdue
• After 21 days overdue: Your account will be suspended
• Suspended accounts retain all data and can be restored immediately upon payment
• After 30 days of suspension, we may terminate the agreement and permanently delete your data after sending final written notice

Total grace period: 51 days from original due date before data deletion.

6. Cancellation and Refunds

6.1 Cancellation & Non-Renewal Rule
(Applies to all plans and all payment methods)

To cancel or stop auto-renewal, please email us at support@kurasu.app.

• Monthly Plans
  Upon receiving your cancellation request, the subscription will continue until the end of the following calendar month.
  Accordingly, you will be invoiced for one additional month and will retain full access to the Service throughout that period.
  
  Example: Cancellation request submitted any day in March → final billing month is April → access ends 30 April


• Annual Plans
  Annual plans cannot be cancelled or refunded mid-term.
  To prevent automatic renewal for the next year, submit your non-renewal request by the last calendar day of the month before your contract renews.
  The plan will then end on the original contract end date.
  
  Example: (1 Apr 2026 – 31 Mar 2027): Request non-renewal by 28 Feb 2027 → no charge from 1 Apr 2027 onward

6.2 Refunds

No refunds, partial refunds, or pro-rated credits are provided under any circumstances.
• Monthly plans: No refund for the current or final paid month
• Annual plans: Fully non-refundable once the annual term has started

6.3 Service Credits and Exceptional Refunds

We aim for 99.9%+ monthly availability. In the unlikely event of extended downtime caused by us, the following applies automatically:

• Outages of 24 hours or more (up to 29 consecutive days)
  If the Service is completely inaccessible for 24 consecutive hours or longer due to our fault, we will automatically issue a service credit equal to the pro-rated fees for the affected period (monthly → next invoice credit; annual → free extension of subscription).
• Catastrophic outage (30+ consecutive days)
  If the Service remains completely inaccessible for 30 or more consecutive days due to our fault, you may request immediate termination of your plan and receive a pro-rated cash refund.
• Permanent discontinuation
  If we shut down ClassHub permanently, we will refund any unused pre-paid annual fees on a daily basis.

6.4 Data After Cancellation / Non-Renewal

Your account will be deactivated on the effective cancellation date (end of the final paid month or annual term).

• We will retain your data for 30 calendar days from the deactivation date in case you wish to reactivate
• You may export your data at any time while your account is still active
• After those 30 days, all data will be permanently and irretrievably deleted

7. Data Ownership and Usage

7.1 Your Data

You retain all rights to the data you input into the Service, including:

• Student information
• Teacher information
• Course and schedule data
• Any other content you create or upload

7.2 License to ClassHub

By using the Service, you grant us a limited, non-exclusive license to host, store, process, and display your data solely for the purpose of providing the Service to you. This license ends when you delete your data or terminate your account.

7.3 Your Responsibilities

You are solely responsible for:

• The accuracy and legality of all data you input into the Service
• Obtaining all necessary consents and permissions to input student data
• Complying with applicable privacy and data protection laws
• Ensuring you have the legal right to use and share all data you input

7.4 Data Backup

While we perform regular backups of the Service, you are responsible for maintaining your own backup copies of important data. We recommend using our export tools regularly to maintain local copies of your data.

7.5 Data Breach Notification

Our data breach notification procedures are detailed in our Privacy Policy. In the event of a breach affecting your data, we will notify you promptly as described in the Privacy Policy, but you remain responsible for notifying your students and complying with applicable breach notification laws in your jurisdiction.

8. User Responsibilities and Acceptable Use

8.1 Account Usage

You agree to use the Service only for lawful purposes and in accordance with these Terms. You are responsible for all activity under your account, including the actions of any teachers, staff, or other users you authorize to access your account.

8.2 Prohibited Activities

You agree NOT to:

• Share your login credentials with unauthorized persons
• Use the Service for any illegal purpose or in violation of any laws
• Attempt to hack, reverse engineer, decompile, or disassemble the Service
• Use automated tools (bots, scrapers) to access the Service excessively or without permission
• Resell, redistribute, or provide unauthorized access to the Service
• Upload viruses, malware, or other malicious code
• Interfere with or disrupt the Service or servers
• Attempt to gain unauthorized access to other users' accounts or data
• Use the Service to send spam or unsolicited communications
• Violate the intellectual property rights of ClassHub or others
• Impersonate another person or organization
• Collect or harvest personal information about other users

8.3 Content Standards

You agree that all data and content you input into the Service will:

• Be accurate and not misleading
• Not violate any applicable laws or regulations
• Not infringe on the rights of others
• Not contain offensive, inappropriate, or harmful content

9. Intellectual Property Rights

9.1 ClassHub's Rights

The Service, including all software, code, designs, logos, trademarks, and content (excluding your data), is owned by ClassHub and is protected by copyright, trademark, and other intellectual property laws.

We grant you a limited, non-exclusive, non-transferable license to access and use the Service in accordance with these Terms. This license does not grant you any rights to:

• Copy, modify, or create derivative works of the Service
• Sell, lease, or sublicense the Service
• Use our trademarks or branding without permission

9.2 Your Rights

As stated in Section 7, you retain all rights to your data. Nothing in these Terms transfers ownership of your data to ClassHub.

9.3 Feedback

If you provide us with feedback, suggestions, or ideas about the Service, you grant us the right to use this feedback without any obligation to compensate you.

10. Service Availability and Modifications

10.1 Service Availability

We strive to provide reliable and consistent service, but we do not guarantee that:

• The Service will be uninterrupted or error-free
• The Service will be available at all times
• All errors or defects will be corrected

The Service may be temporarily unavailable due to maintenance, updates, or circumstances beyond our control.

10.2 Maintenance

We may perform scheduled or emergency maintenance on the Service. When possible, we will provide advance notice of scheduled maintenance that may cause service interruptions.

10.3 Service Modifications

We reserve the right to:

• Modify, update, or discontinue any features of the Service
• Add new features or functionality
• Change the technical specifications of the Service

We will make reasonable efforts to notify you of significant changes that materially affect your use of the Service.

11. Disclaimers and Limitation of Liability

11.1 "As-Is" Service

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO:

• WARRANTIES OF MERCHANTABILITY
• FITNESS FOR A PARTICULAR PURPOSE
• NON-INFRINGEMENT
• UNINTERRUPTED OR ERROR-FREE OPERATION

You use the Service at your own risk. We do not warrant that the Service will meet your specific requirements or that it will be suitable for your particular purpose.

11.2 Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, CLASSHUB SHALL NOT BE LIABLE FOR:

• ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES
• LOSS OF PROFITS, REVENUE, DATA, OR BUSINESS OPPORTUNITIES
• BUSINESS INTERRUPTION
• LOSS OF DATA OR CORRUPTION OF DATA
• COST OF SUBSTITUTE SERVICES

IN NO EVENT SHALL OUR TOTAL LIABILITY TO YOU FOR ALL CLAIMS ARISING FROM OR RELATED TO THE SERVICE EXCEED THE AMOUNT YOU PAID US IN THE 12 MONTHS IMMEDIATELY PRECEDING THE EVENT GIVING RISE TO THE CLAIM.

11.3 Exclusions

Some jurisdictions do not allow the exclusion of certain warranties or limitation of liability. In such cases, our liability will be limited to the greatest extent permitted by applicable law.

12. Indemnification

You agree to indemnify, defend, and hold harmless ClassHub and its officers, directors, employees, and agents from and against any claims, liabilities, damages, losses, costs, or expenses (including reasonable attorneys' fees) arising from or related to:

• Your use of the Service
• Your violation of these Terms
• Your violation of any applicable laws or regulations
• Your violation of any third-party rights, including intellectual property rights or privacy rights
• Any data or content you input into the Service
• The actions of your teachers, staff, or other authorized users

13. Termination

13.1 Termination by You

You may terminate your subscription at any time in accordance with Section 6 (Cancellation and Refunds).

13.2 Termination or Suspension by Us

We may suspend or terminate your account and access to the Service in the following cases:

• Non-payment
  As described in Section 5.6 (Late Payment and Account Suspension)
• Violation of these Terms
  We may immediately suspend or terminate if you materially breach these Terms (including repeated or serious violations)
• Illegal activity or fraud
  Immediate termination without notice if we reasonably believe you are engaged in illegal activity, fraud, or activity that poses a security risk to the Service or other users
• Required by law
  Immediate termination if required by applicable law, regulation, or court order
• At our discretion
  We may terminate your account with 30 days’ prior written notice for any reason or no reason

13.3 Effect of Termination

• Your access to the Service ends on the effective date of termination
• You will not be charged for any period after the termination date (outstanding amounts remain due)
• Your data will be handled exactly as described in Section 6.3 (30-day retention after deactivation, then permanent deletion)
• Provisions that by their nature should survive (including payment obligations, confidentiality, liability limitations, and dispute resolution) will continue to apply

14. Governing Law and Dispute Resolution

14.1 Governing Law

These Terms shall be governed by and construed in accordance with the laws of Japan, without regard to its conflict of law principles.

14.2 Jurisdiction

Any disputes arising from or relating to these Terms or the Service shall be subject to the exclusive jurisdiction of the courts of Japan.

14.3 Informal Resolution

Before filing any formal claim, you agree to first contact us at support@kurasu.app to attempt to resolve the dispute informally.

15. Changes to These Terms

15.1 Right to Modify

We reserve the right to modify these Terms at any time. We will notify you of material changes by:

• Posting the updated Terms on our website with a new "Last Updated" date
• Sending an email notification to the address associated with your account
• Displaying a prominent notice within the Service

15.2 Acceptance of Changes

Your continued use of the Service after we publish or send notice of changes to these Terms constitutes your acceptance of the updated Terms. If you do not agree to the updated Terms, you must stop using the Service and may cancel your account as described in Section 6.

15.3 Notice Period

For material changes that adversely affect your rights, we will provide at least 30 days' notice before the changes take effect.

16. General Provisions

16.1 Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between you and ClassHub regarding the Service and supersede all prior agreements and understandings.

16.2 Severability

If any provision of these Terms is found to be invalid or unenforceable, the remaining provisions will continue in full force and effect.

16.3 Waiver

Our failure to enforce any right or provision of these Terms will not be deemed a waiver of such right or provision.

16.4 Assignment

You may not assign or transfer these Terms or your account without our prior written consent. We may assign these Terms without restriction.

16.5 No Agency

Nothing in these Terms creates any agency, partnership, joint venture, or employment relationship between you and ClassHub.

16.6 Force Majeure

We shall not be liable for any failure or delay in performance due to circumstances beyond our reasonable control, including natural disasters, acts of war, terrorism, labor disputes, or failures of internet service providers.

17. Contact Information

If you have questions about these Terms, please contact us:

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