Privacy Policy

Handling of Personal Information and User Data in the "Block Thru" Service

Last updated: August 10, 2026

The following describes how we handle personal information and user data in connection with our smartphone game app "Block Thru" (the "Service").

Information We Collect

In providing the Service, we collect the following information:

1. Account and profile information: your nickname, selected skin, the password you set for data transfer, and identifiers used to identify you (such as a user ID and access code).
2. Gameplay data: your score (depth), number of plays, number of times captured, number of treasure chests opened, and progress such as acquired skins and collections.
3. Device and technical information: OS type and version, app version, device model, screen size and resolution (DPI), language and region setting (locale), timezone, build type, and session identifier.
4. Usage and analytics data: number of launches, first launch date, and event information regarding how features are used (such as sharing actions).
5. Install attribution information: referral information used to measure installs originating from share links (such as the Google Play install referrer on Android).

The Service does not collect contact information such as your name, address, telephone number, or email address, except when you contact us. It also does not collect precise location information, device advertising identifiers (IDFA / advertising ID), or unique device identifiers. The Service does not display advertisements, and information related to purchases and payments is handled by the Apple App Store or Google Play; we do not collect payment information itself.

Purposes of Use

We use the information we collect for the following purposes:

1. Providing, maintaining, and troubleshooting the Service.
2. Managing game accounts and storing and transferring data between devices.
3. Providing and displaying the ranking feature.
4. Improving the quality of the Service and analyzing usage.
5. Measuring install sources via the sharing feature.
6. Preventing fraudulent use and ensuring stable operation of the Service.
7. Responding to your inquiries.

Proper Acquisition and Legal Compliance

We acquire personal information appropriately, without using false or other fraudulent means. We also comply with laws, regulations, national guidelines, and other standards regarding the handling of personal information.

Public Display in Rankings

In the Service, the nickname and score you set are made public to other users. Please do not include information you do not wish to be public in your nickname.

Third-Party Services and Processors

We use the following external services to provide the Service, and some of the information described above may be processed by these providers:

• Microsoft Azure (server and data storage, and usage analytics via Application Insights).
• Google Play (distribution of the Android version and install measurement via the install referrer).
• Apple App Store (distribution of the iOS version).

With some of these services, data may be stored and processed in data centers located outside of Japan.

Data Retention

1. Account information and gameplay data stored on our servers (nickname, score, progress, etc.) are retained for as long as necessary to provide the Service, and will be deleted within a reasonable period upon your request for deletion, or after 3 years have elapsed since your last access.
2. Usage and analytics data (such as Application Insights) are automatically deleted, in principle, after 90 days have elapsed, in accordance with the retention settings of that service.
3. Information that we are required by law to retain will be kept for the period prescribed by the applicable law.

Security Measures

We take necessary and appropriate measures to prevent the leakage, loss, or damage of the personal information we handle and to otherwise manage it securely (for example, storing access codes in encrypted form and encrypting communications).

Your Rights and Data Deletion

You may request the disclosure, correction, addition, suspension of use, or deletion of your personal information that we hold. To do so, please contact us using the contact information below.

Local data of the Service is deleted by uninstalling the app. If you wish to delete data stored on our servers, please contact us using the contact information below.

Children's Privacy

The Service is not primarily directed at children. We do not knowingly collect personal information from minors without the consent of their guardian. If a child uses the Service, they should do so with the consent of a legal guardian (such as a parent).