Terms of Use

Effective date: June 21, 2026

This is a translation of the original Japanese document. In the event of any discrepancy, the Japanese version prevails.

These Terms of Use ("Terms") set out the conditions for using the application "MUSMON" and related services (the "Service") provided by rei wakamatsu (the "Operator"). By using the Service, the user ("User") agrees to these Terms.

1. Acceptance

By using the Service, the User is deemed to have agreed to these Terms.

2. Changes to the Terms

The Operator may amend these Terms without the User's prior consent. The amended Terms take effect when posted on the Service or within the app. Material changes will be notified appropriately within the app or otherwise.

3. Personal Information

The Operator handles User information in accordance with its separately defined Privacy Policy.

4. Operating Environment

Use of the Service requires an iOS or Android device and an internet connection. The Service may not operate correctly depending on the User's environment.

5. Paid Plan (Subscription)

The Service offers an auto-renewing paid subscription, "Premium," which unlocks additional features.

6. Intellectual Property

7. User Content (Community Features)

The Service includes features that let Users set and publish nicknames, profiles, and similar content.

8. Prohibited Acts

Users must not engage in the following:

9. Suspension / Forfeiture of License

The Operator may, without prior notice, suspend the User's use of the Service or revoke the license if the User falls under any of the following. Upon revocation, the User must promptly destroy programs and data related to the Service.

10. Temporary Interruption / Suspension

The Operator may interrupt or suspend the Service without prior notice in the following cases. The Operator is not liable, to the extent permitted by law, for any resulting damage.

11. Changes / Termination of the Service

The Operator may change, suspend, interrupt, or terminate all or part of the Service at any time and for any reason, without prior notice to Users.

12. Disclaimer

To the extent permitted by law, the Operator is not liable for any damage arising from use of, or inability to use, the Service (except in cases of the Operator's willful misconduct or gross negligence).

13. Damages

14. App Store / Google Play Provisions

If the Service is obtained from the App Store (Apple Inc.), the following apply:

15. Eligibility / Age

The Service is not intended for use by persons under 13 (or under 16 in the European Economic Area). Minors must use the Service with the consent of a parent or guardian.

16. Governing Law / Jurisdiction

These Terms are governed by the laws of Japan. The Tokyo District Court shall have exclusive jurisdiction as the court of first instance for any dispute relating to the Service or these Terms.

17. Contact

Inquiries about the Service or these Terms: rwakamatsu.biz@gmail.com