Terms of Service

Last updated: August 19, 2026

These terms govern your use of Tsuzuku — the app and website (tsuzuku.app) operated by Kotaro Okuda (the "Operator") that turns your diary into manga (together, the "Service"). By using the Service you agree to these terms.

1. Accounts

The Service works with an anonymous user ID. You may link an Apple or Google account for data transfer. Your account is for your personal use only and may not be transferred or lent to anyone else. You are responsible for keeping your linked account secure.

2. Your content

The diary you record (text, photos, voice, video) and the manga generated from it belong to you. The Operator may use them only as needed to provide, maintain, and improve the Service — including generating your manga, displaying published pages, creating thumbnails and share images, and improving quality. The Operator never sells or shares your content with third parties for advertising purposes.

3. AI generation

Manga are generated using external AI providers' APIs. The content, quality, and accuracy of generated manga are not guaranteed; they may depict things differently from your diary or contain unintended expressions. If generation fails (for example, a page comes out blank), the credits used for that generation are refunded in full.

4. Credits and purchases

Generating manga uses credits, which you can buy through App Store or Google Play in-app purchases.
Purchased credits never expire (except if the Service ends; see Section 8).
Credits cannot be exchanged for cash or transferred to anyone else.
Cancellations and refunds after purchase follow each store's policies. This does not limit the credit refund for failed generations described above.
The Operator may set separate conditions for credits granted free of charge.

5. Publishing

When you set an issue to "link-only" or "public", people with the link — or everyone — can read it. You can withdraw publication at any time. You are responsible for the content you publish.

6. Prohibited conduct

Infringing anyone's copyright, likeness rights, privacy, or other rights
Publishing information or photos that identify another person without their permission
Publishing illegal, obscene, or hateful content
Impersonating others
Unauthorized access, reverse engineering, or interfering with the operation of the Service
Abusing credits or the refund system

7. Reports and enforcement

Published manga carry a report channel. The Operator may unpublish or delete content that violates, or appears to violate, these terms without prior notice. Serious or repeated violations may result in account suspension.

8. Changes, interruption, and termination of the Service

The Operator may temporarily interrupt all or part of the Service for maintenance or other reasons. If the Service is discontinued, the Operator will give reasonable advance notice and will refund unused purchased credits or take other reasonable measures.

9. Disclaimer

Except in cases of willful misconduct or gross negligence, the Operator is not liable for damages arising from your use of the Service. Where the Operator is liable, its liability is capped at the amount you paid for the Service in the preceding 12 months. These limits do not apply where they are invalid under applicable law, including consumer-protection law.

10. Changes to these terms

These terms may be revised within the bounds of applicable law. Significant changes will be announced on the Service in advance. Continuing to use the Service after a change means you accept the revised terms.

11. Governing law and jurisdiction

These terms are governed by the laws of Japan. Any disputes shall be subject to the exclusive jurisdiction of the Tokyo District Court in the first instance.

12. Contact

Operator: Kotaro Okuda
Contact: support@tsuzuku.app