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HYAKKI ONSEN

Privacy Policy

Date of Establishment: July 12, 2026
Last Revised: September 2, 2026

STUDIO-GENNAI (the “Operator”) establishes this Privacy Policy (the “Policy”) regarding the handling of information about users of the smartphone game app “Hyakki Onsen” (the “App”) provided by the Operator.

Article 1 (Information Collected Directly by the Operator)

  1. An account is not required to use the App. The Operator does not directly collect names, email addresses, telephone numbers, or other personal information from users.
  2. Game save data is stored only on the user’s device and is not transmitted to the Operator’s servers.

Article 2 (Collection of Information by Third-Party Services)

The App uses the following third-party services for advertising, measuring advertising effectiveness, analyzing usage, and improving quality. These services may collect and process device information, advertising identifiers, IP addresses, OS and app versions, usage information, in-app events, and other information.

  1. Google AdMob (Google LLC)
    The App displays rewarded ads when the user chooses to view them. Advertising identifiers and similar information may be used for ad delivery, effectiveness measurement, and fraud prevention. Through AdMob mediation, ads from AppLovin Corp. and Unity Technologies may also be delivered.
    - Google: https://policies.google.com/privacy
    - AppLovin: https://www.applovin.com/privacy/
    - Unity: https://unity.com/legal/privacy-policy
  1. Firebase Analytics / Google Analytics (Google LLC)
    These services collect aggregated information about screen views, feature usage, in-app events, and advertising and purchase activity. The Operator may connect these services with Google Ads for advertising effectiveness measurement. Analytics data may also be exported daily to Google Cloud BigQuery.
  1. Firebase Crashlytics (Google LLC)
    This service collects technical information about app crashes and malfunctions and uses it to improve quality.
    - https://firebase.google.com/support/privacy
  1. Meta App Events (Meta Platforms, Inc.)
    The Operator may send in-app events, including tutorial completion, in-game actions, and purchases, for advertising effectiveness measurement and optimization of ad delivery. Where legally required, consent will be obtained. On iOS, measurement using advertising identifiers will be performed only if ATT permission has been granted.
    - https://www.facebook.com/privacy/policy/

Article 3 (Tracking Permission — iOS)

On the iOS version, the App may request permission to track the user through Apple’s App Tracking Transparency (ATT) after the initial onboarding flow. Refusing permission does not affect game functionality, purchases, or the use of ad rewards. However, it may affect the accuracy of advertising effectiveness measurement and personalization.

Article 4 (Consent for Users in the European Economic Area and Other Regions)

For users in the European Economic Area (EEA), the United Kingdom, and Switzerland, the App displays a consent screen at initial launch regarding the handling of information related to advertising. Consent settings can be changed or withdrawn at any time from within the App.

Users who need to change their consent settings will be provided with a settings screen in the App under “Privacy Settings.”

Article 5 (In-App Purchases)

In-app purchases in the App are processed through the App Store operated by Apple Inc. or Google Play operated by Google LLC. The Operator does not collect or store users’ credit card numbers or other payment information.

Article 6 (Push Notifications)

The App uses local notifications processed on the device to notify users of events such as when idle earnings are ready to collect. Notifications are displayed only with OS permission and can be disabled at any time through the device settings or the App settings.

Article 7 (Use by Children)

The App is not intended exclusively for a specific age group. Parents and guardians may use device controls, such as Screen Time on iOS or Google Family Link on Android, to restrict purchases or advertising where necessary.

Article 8 (Disclosure to Third Parties and Handling Outside Japan)

The Operator does not sell users’ names, email addresses, or other information to third parties. However, information necessary for advertising, effectiveness measurement, analytics, and quality improvement may be transmitted to and processed by the relevant providers through the SDKs and other technologies of the third-party services described in Article 2. This information may be processed on the servers of those providers, including servers located outside Japan. Please review the privacy policies of the respective providers for details.

Article 9 (Security)

The Operator implements reasonable security measures to prevent the leakage, loss, or damage of information it handles.

Article 10 (Changes to This Policy)

The Operator may revise this Policy in response to changes in laws or additions or changes to the App’s functions. If material changes are made, the Operator will notify users within the App or on the relevant store page. The revised Policy takes effect when it is posted on this page.

Article 11 (Contact)

For inquiries regarding this Policy or the handling of user information, please contact:

  • Developer: STUDIO-GENNAI
  • Contact: studio.gennai1@gmail.com

End.