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Terms of Use

Last updated: August 22, 2026

These Terms of Use ("Terms") set out the conditions for using KAYA ("Service"), an app for nurturing relationships through personalized readings grounded in classical Eastern systems and provided by Ryoichi Sasaki ("Operator"). Please read these Terms before using the Service.

1. Scope

These Terms apply to all relationships between users and the Operator regarding the Service. By installing or using the Service, you are deemed to have agreed to these Terms.

2. Service

The Service provides personalized readings based on classical Eastern systems such as Four Pillars of Destiny and Zi Wei Dou Shu, together with AI-generated explanations.

The readings and explanations are reference information derived from those classical systems. They are not a substitute for medical, legal, financial, or other professional advice, and accuracy or completeness is not guaranteed.

3. Conditions of Use

4. Prohibited Acts

5. Intellectual Property

Designs, text, software, and other content in the Service belong to the Operator or legitimate rights holders. Copying, modifying, or reusing them beyond the permitted scope is prohibited.

6. Disclaimer

7. Paid Service (Premium)

The Service includes free and paid Premium features. Purchases and cancellations follow the rules of the App Store or Google Play.

For the web version, you can purchase via credit card payment through a payment service provider designated by the Operator. Subscriptions renew automatically on each renewal date unless canceled, and can be canceled anytime from account settings. Even after cancellation, you can continue using the service until the end of the current period. Except where required by law, refunds are not provided once service has begun.

8. Changes and Termination

The Operator may change, suspend, or terminate the Service without prior notice and is not liable for resulting damages except as otherwise required by applicable law.

9. Changes to Terms

The Operator may update these Terms as needed. Updated Terms become effective when posted on this page. Important changes may also be announced in the app.

10. Governing Law and Jurisdiction

These Terms are governed by the laws of Japan. The Tokyo District Court has exclusive jurisdiction as the court of first instance for disputes related to the Service.

11. Mandatory Consumer Rights

Nothing in these Terms limits any mandatory consumer rights that cannot be excluded under the laws applicable to you.

12. Contact

Contact: [email protected]
Ryoichi Sasaki