BRAIN-JIU-JITSU

Privacy Policy

Privacy Policy

Last Updated: 2025/11/07


“Brain-Jiu-Jitsu” (hereinafter referred to as “the App”) respects the privacy of its users and is committed to protecting personal information. This Privacy Policy explains what information we collect, how it is used, and how it is safeguarded.

1. Information We Collect

1.1 Information Provided by Users

We may collect the following information when users voluntarily provide it:

  • Account information (e.g., email address, username)
  • Jiu-jitsu history, match records, training logs, and skill progress data entered by the user

1.2 Information Collected Automatically

The App may automatically collect:

  • App usage data (e.g., viewed videos, accessed features, in-app behaviors)
  • Device information (device model, OS version, app version, IP address, device identifiers required for analytics)

If a WebView is used in the App, cookies or similar technologies may also be used for session management.

2. Purpose of Information Use

We use collected information for the following purposes:

  • Managing and maintaining user accounts
  • Visualizing training progress and providing personalized guidance through AI
  • Improving App functionality and developing new features
  • Providing user support and responding to inquiries
  • Ensuring the stable operation and security of the App

3. Information Sharing

We do not share personal information with third parties except in the following cases:

3.1 Service Providers

We may use third-party services such as Google Analytics to analyze usage trends.

These services may collect:

  • Device identifiers
  • Usage data
  • Diagnostic information

These services operate under their own privacy policies.

3.2 Legal Compliance

Information may be disclosed if required by law, regulation, or government authority.

3.3 Consent for Personal Data Sharing

If personally identifiable information must be shared with third parties, we will obtain explicit user consent beforehand.

4. Security Measures

We take reasonable organizational and technical measures, including:

  • SSL/TLS encryption for data transmission
  • Strict access controls to servers storing personal information
  • Continuous monitoring of security practices

5. Cookies

If the App uses WebView components, cookies may be used to enhance usability.

Users may control cookie settings through their device or browser settings.

(※ If the App does not use WebView, cookies will not be used.)

6. User Rights

Users have the right to:

  • Access, review, and edit their personal information through profile settings
  • Request account deletion by contacting our support team(All associated data will be deleted according to our data retention policy)

7. Children’s Privacy

This App is not intended for children under the age of 13.

If we learn that personal information from a child under 13 has been collected without parental consent, we will delete it promptly.

8. Updates to the Privacy Policy

This Policy may be updated as needed.

Any changes will be communicated via in-app notifications or email.

Continued use of the App after updates constitutes acceptance of the revised Policy.

9. Contact Information

If you have questions or concerns, please contact us at:

Email: brainjiujitsu@gmail.com

Operator: Kazuhiro Miyachi & Kelly Bryan

Locations: Tokyo, Japan / California, U.S.A.