Privacy Policy

Last Updated: July 3, 2026

This is an English translation provided for convenience. In the event of any conflict between this translation and the Japanese version, the Japanese version shall prevail.

About the Operator

Yomu (the "App") is provided by Jumpei Takiyasu (the "Operator"). This policy governs the handling of personal information in the App and related web pages (the "Service").

• Operator: Jumpei Takiyasu
• Contact: https://yomu.juntaki.com/en/support

Section 1 – Information We Collect

The Service handles the following information to provide its features. Imported PDFs, the search index, reading position, and settings are principally stored only on the user's device and are not sent to the Operator's servers.

• Information processed during billing: Product ID, Transaction ID, and other purchase/restoration data. This is processed directly by Apple through StoreKit and does not pass through the Operator's servers.
• Information sent when contacting support: name, email address, and message content submitted via the support form
• Access logs: Access date/time, request destination, response result, source IP address, and related information for this website (may be recorded and retained by the Operator or contracted infrastructure providers for incident response, fraud prevention, and security maintenance)

Section 2 – Purpose of Use

Collected information is used solely within the following purposes. The Operator will not use personal information beyond these purposes.

• Providing features such as PDF reading and full-text search
• Enforcing the library book-count limit and reflecting purchase status (based on on-device StoreKit information)
• Fraud prevention, incident response, and security maintenance
• Responding to inquiries and sending important notices
• Improving and enhancing the Service (including creating statistical information in non-personally identifiable form)

Section 3 – Use of Third-Party Services

The Service uses the following third-party services as sub-processors to provide its features. How each handles information follows their respective privacy policies.

• Apple Inc.: In-App Purchase (StoreKit) / Privacy Policy: https://www.apple.com/legal/privacy/
• Cloudflare, Inc.: Hosting infrastructure for this website / Privacy Policy: https://www.cloudflare.com/privacypolicy/

Section 4 – Disclosure to Third Parties

The Operator will not provide users' personal information to third parties except in the following cases. Transmission of information to sub-processors listed in Section 3 constitutes "entrustment" and does not constitute third-party disclosure.

• With the user's consent
• As required by law
• When necessary to protect a person's life, body, or property, and obtaining consent is difficult
• When cooperation is required for a government agency, local government, or their agent to execute duties prescribed by law

Section 5 – Cross-Border Transfers

In using this Service, personal information may be processed outside Japan. The Operator reviews sub-processors' security measures and contractual terms before use.

• United States: Processing on servers of sub-processors such as Apple and Cloudflare
• Other countries: Processing on globally operated infrastructure of sub-processors (specific countries may vary based on infrastructure configuration)

Section 6 – Cookies & Tracking Technologies

The App does not use cookies, IDFA (advertising identifier), or other tracking technologies for ad delivery or measurement.

Our website uses Google Analytics to understand access trends. This service may collect access information using cookies. Information collected is managed under Google's Privacy Policy and is not used by the Operator to identify individuals. Users can disable cookies through their browser settings.

Section 7 – Minors

Users under 18 years of age must obtain parental consent before making an in-app purchase. If the Operator discovers it has unintentionally collected personal information from a minor, it will delete that information promptly.

Section 8 – Security Measures

The Operator implements the following security measures to prevent leakage, loss, or damage of personal information.

• Organizational measures: Establishing rules for handling personal information; reviewing handling status
• Technical measures: TLS encryption for communications. In-app purchase records rely on Apple's security infrastructure and are not stored on the Operator's servers.
• Physical measures: Relying on the physical security of contracted cloud service providers

Section 9 – Retention, Deletion & User Rights

[Retention Period] On-device data (PDFs, reading position, settings, etc.) is retained until deleted by the user or the app is uninstalled; this website's access logs and other fraud-prevention logs are retained for the period required by law or necessary to achieve their purpose.

[Data Deletion] Uninstalling the app deletes on-device data. In-app purchase records are managed by Apple; the Operator does not hold this information.

[User Rights] To the extent that the Operator holds personal information subject to disclosure obligations under applicable law, users may request notification of purpose of use, disclosure, correction/addition/deletion, suspension or erasure of use, and suspension of third-party provision, pursuant to the Act on the Protection of Personal Information. The Operator will respond in accordance with the law after verifying the requester's identity. For the request procedure, please contact the inquiry desk at the bottom of this policy.

Section 10 – Policy Updates

• The Operator may update this policy in response to legal changes or feature updates.
• For material changes, users will be notified at least 30 days before the effective date via in-app notification or posting on this page.
• For minor changes, posting on this page may serve as the notification.

Section 11 – Contact

For inquiries regarding this policy, or to request disclosure, correction, or deletion of personal information, please contact us at:

• Operator: Jumpei Takiyasu
• Support page: https://yomu.juntaki.com/en/support