Privacy Policy

Basic Information

This Privacy Policy explains how personal information is handled in Storybook Cabin (えほんのこや; the "App").

• App name: Storybook Cabin (えほんのこや)
• Operator: Sunaba Base
• Address: Dai-2 Mori Building 401, 4-24-5 Meieki, Nakamura-ku, Nagoya, Aichi 450-0002, Japan
• Contact: Support page

1. Information We Collect

To provide the service, the App collects the following information.

Information you enter

• Email address (if you sign in with email)
• The identifier and email address linked to your Apple ID or Google account (if you sign in with Apple or Google)
• Information about your children (nickname, year and month of birth)
• Reading logs (books borrowed, comments, favorites, due dates, etc.)
• Book cover images that you photograph or add yourself
• The library you use
• Your bookshelf and group settings, and information about the people you share with

Information collected automatically

• An anonymous user identifier (if you use anonymous sign-in)
• Your device's push notification token (if you allow notifications)
• How you use the App (records of screens viewed, taps, and use of some features)
• Device information (model, OS type and version, app version, language, region and time zone settings, screen size) and IP address
• Approximate region estimated from your IP address
• Error information
• How you browse the App's website (ehonnokoya.com) (access information using cookies)

Purchase information

• The status of your subscription and scan pack purchases, the dates and times of purchase, renewal and cancellation, plan type, and purchase identifiers contained in receipts

Purchases are processed by Apple (App Store) or Google (Google Play). The operator never receives payment information such as credit card numbers.

Images when you use the OCR feature

• Images of receipts or picture book covers that you take or select

2. How We Use Information

We use the information we collect for the following purposes.

• Account management and authentication
• Saving and displaying reading logs
• Showing recommended picture books and creating reading reports
• Due-date reminder notifications
• Checking subscription status, providing paid features, and managing usage counts
• Reading bibliographic information with the OCR feature
• Responding to inquiries
• Investigating problems and improving the service
• Creating statistics processed so that individuals cannot be identified (see the next section)

3. Use of Reading Logs and Comments

The operator uses the reading logs you register (books read, favorites, comments, etc.) and your child's age (in months) for the following purposes.

• To show recommended picture books that match your child's tastes
• To aggregate trends such as "picture books often read at this age" in a form that cannot identify individuals, and use them to improve recommendations and for introductions within the App

In doing so, we promise the following.

• Aggregated results are used only as statistics that cannot identify any specific user or child.
• We never publish the text of the comments you write to other users or outside parties without your individual consent.
• Records such as comments are processed automatically by programs. As a rule, the operator does not read your records or comments, except when necessary, such as to respond to inquiries, investigate problems, check for misuse, or check and improve the recommendation system. Even when we look at them to check and improve the recommendation system, we do not use them to identify any specific user or child.
• The text of your comments is never visible to other users. The degree of liking read from comments may be used in aggregation that counts numbers of people.
• We never publish your child's nickname or year and month of birth to other users or outside parties.

Opting out

This use is turned on by default. If you do not want your reading logs and comments to be used for aggregation or trend analysis, you can stop it at any time by turning off the switch under "Data & Privacy" in Settings.

• From the time you turn it off (it may take up to one day to take effect), your data is excluded from aggregation.
• When you turn it off, recommended picture books are no longer shown.
• Even if you turn it off, you can continue to use the App's basic features, such as saving and viewing your own reading logs.
• You can turn the setting back on at any time.

4. Handling of Images in the OCR Feature

Images taken or selected with the OCR feature are sent to an external generative AI service (Anthropic's Claude API) solely to read the text in them.

• We do not store the images sent on the operator's servers or databases.
• At Anthropic, images are retained for the period set out in its terms, for purposes such as preventing misuse, and then deleted.
• Under Anthropic's commercial terms, images sent through the API are not used to train AI models.
• Only the bibliographic information obtained from reading the image (title, author, etc.) is saved as part of your reading logs.

We do not send reading logs or information about your children to external AI services to create reading reports or to show recommended picture books.

5. Provision to Third Parties

The operator does not provide personal information to third parties except in the following cases.

• With your consent
• When required by law
• When necessary to protect a person's life, body or property and it is difficult to obtain your consent

If you use the bookshelf or group sharing features, the contents of the shared bookshelves and reading logs are shown to the people you have chosen to share with.

6. Use of External Services (Outsourcing and Transfers Abroad)

The App uses the following external services to provide the service, and entrusts the handling of information to them to that extent. Because these companies are located outside Japan, your personal information may be transferred abroad.

You can stop Google Analytics from collecting information on the website with the "Google Analytics Opt-out Browser Add-on" provided by Google.

If you sign in with an Apple ID or Google account, information is exchanged between that company and you during authentication. Each company handles information according to its own privacy policy.

For information about each country's personal information protection system and the protective measures taken by recipients, please contact us through the Support page.

In addition, to search for and obtain bibliographic information, we use the Calil API, Rakuten Books API, openBD, National Diet Library Search (NDL Search), Google Books API and Open Library. We send them only search terms (titles, ISBNs, etc.) and never information that can identify you.

7. Access to Device Features

When you use the following features, the App accesses device features with your permission. You can change these permissions at any time in your device settings.

• Camera: scanning barcodes and taking photos for OCR
• Photo library: choosing images to use for OCR
• Notifications: due-date reminders

8. Storage and Deletion of Data

• Your data is stored until you delete your account.
• You can delete your account from the Settings screen in the App. When you do, related data, including information about your children and reading logs, is also deleted.
• If you use anonymous sign-in, you may not be able to restore your data after deleting the App or changing devices.
• Transaction records and other data that must be kept by law may be retained for the required period even after deletion.
• Statistics that have already been aggregated so that individuals cannot be identified may be kept after your account is deleted.

9. Information About Children

The App is intended for use by adults, such as parents and family members. Information about children is entered by parents to manage reading logs, and we do not ask for information that directly identifies a child, such as their full name or address.

Minors who use the App themselves should do so with the consent of a parent or guardian.

10. Requests for Disclosure, Correction, Suspension of Use, etc.

You may request disclosure, correction, addition, deletion, suspension of use, etc. of your personal information. Please contact us through the Support page. After confirming your identity, we will respond in accordance with the law.

11. Changes to This Policy

If we change this Privacy Policy, we will post the revised version on this page and notify you in the App of any important changes.

Contact

For inquiries about this Privacy Policy, please use the Support page.