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Privacy Policy

Last Updated: September 16, 2025

1. Basic Policy

Sun Digital Health Co., Ltd. (“we,” “our,” or “the Company”) recognizes the importance of personal information and complies with the Act on the Protection of Personal Information of Japan and other applicable laws and regulations. We are committed to the appropriate handling and protection of personal information.

2. Purpose of Use of Personal Information

We use the personal information we collect for the following purposes:

  • To provide, operate, and improve our products and services (including myWaves)
  • To respond to inquiries and provide customer support
  • To deliver purchased products and process payments
  • To analyze usage trends and improve service
  • To utilize anonymized or statistical data for service improvement and scientific research (we do not use personally identifiable data for such purposes)
  • To send information on new products and services or marketing communications (with opt-out options)
  • To comply with legal obligations

3. Types of Information We Collect

We may collect the following types of information:

  • Personal Information: Name, postal address, email address, phone number, user ID, etc.
  • Technical Information: IP address, browser information, OS, device identifiers, location data, etc.
  • Usage Information: Browsing history, click history, search queries, access time, referrer URL, etc.
  • Device Data(which may include Sensitive Personal Information): Brainwave data and sleep-related data measured and uploaded by the myWaves device. This includes data obtained via Apple HealthKit or Google Health, as well as data directly collected through the Android application.
  • Statistical/Anonymized Data: Data processed so that individuals cannot be identified

4. Handling of Sensitive Personal Information

The brainwave data we collect as “Device Data” may contain information related to the health condition of users and may constitute sensitive personal information under Japanese law. By agreeing to this Privacy Policy, you consent to our collection of such data.

5. Methods of Collection

  • Direct input by users (account registration, form submission, etc.)
  • Automated collection via cookies, access logs, etc.
  • Data obtained from partner companies (e.g., payment processors, analytics providers)
  • Data uploaded from the myWaves device
  • Sleep data obtained via Apple HealthKit, Google Health, or directly through the Android application

6. Provision of Personal Information to Third Parties

We will not provide personal information to third parties without prior consent, except in the following cases:

  • When required by law
  • When necessary to protect life, body, or property
  • When outsourcing to service providers (e.g., shipping companies, payment processors, hosting providers) to the extent necessary for business operations

7. Management of Personal Information (Security Measures)

We take appropriate measures to prevent unauthorized access, leakage, alteration, and loss of personal information, including:

  • Access controls and password protection
  • SSL or equivalent encryption for communications
  • Data encryption (both at rest and in transit)
  • Secure management in cloud environments
  • Employee training and supervision of contractors

8. Use of Cookies

We may use cookies and similar technologies for purposes such as improving user convenience, analyzing usage trends, and delivering advertisements. Users can disable cookies in their browser settings; however, some functions of the website may become unavailable.

9. Marketing and Opt-Out

We may send product and service information by email where permitted by law or with user consent. Users may opt out at any time by clicking the unsubscribe link in emails or contacting us at info@sdh.co.jp.

10. Data Storage and Overseas Transfers

We store and process personal information on servers located in Japan and the United States. Specifically, we use Amazon Web Services (AWS) data centers in Japan and the U.S., with appropriate safeguards such as encryption and access controls. When handling personal information outside Japan (e.g., in the U.S.), we manage it in accordance with the Act on the Protection of Personal Information of Japan.

11. Requests for Disclosure, Correction, and Suspension of Use

Users may request the disclosure, correction, addition, deletion, or suspension of use of their personal information held by us. Requests should be submitted to the contact point below. In principle, no fees will be charged, but actual costs may be requested in accordance with laws and regulations.

12. Privacy of Minors

Our services are not intended for minors. Minors may only use the services with the consent of a parent or guardian. If we learn that we have collected personal information from a minor without such consent, we will promptly delete it.

13. Revisions to this Privacy Policy

We may revise this Privacy Policy as necessary. Revisions will be posted on this page, and the “Last Updated” date will be updated accordingly.

14. Contact Information

For inquiries regarding this Privacy Policy, please contact:

Sun Digital Health Co., Ltd.
JEI Hamamatsucho Building 4F
2-2-12 Hamamatsucho, Minato-ku, Tokyo 105-0013, Japan
Email: info@sdh.co.jp

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