Privacy Policy

Established: March 5, 2026

This Privacy Policy explains how the website "Shigure no Hyakunin Isshu" (the "Site") handles personal information.

1. Information We Collect

The Site may collect information from users when they use certain features, such as the ranking feature of the online Hyakunin Isshu karuta match and the contact form.

The Site offers sign-in with a Google account for joining the karuta game rankings and for using the contact form. When you sign in, we collect the following information:

• The display name of your Google account
• The email address of your Google account
• The profile image URL of your Google account

Signing in is required only for the features listed below. You can browse the Site and use its basic features without signing in.

• Joining the rankings of the Hyakunin Isshu karuta game
• The contact form

When you use these features, we collect the information you enter, such as your name (or nickname), email address, and the content of your posts or inquiries.

2. How We Use Information

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

• Showing your display name and icon in today's win-count ranking
• Managing and tallying ranking data
• Responding to inquiries and contacting you when necessary
• Improving our services and operating the Site

We will not use the information we collect for any other purpose.

3. Data Management and Disclosure to Third Parties

• Security: The Site uses Google Firebase (Firestore / Realtime Database) to manage data. The information we collect is stored on Google's servers and protected with appropriate security measures.
• No disclosure to third parties: We will not provide personal information to third parties without your consent, except as required by law.

4. External Services and Analytics

• The Site uses Google Sign-In for authentication. Your use of it is subject to Google's Privacy Policy.
• The Site uses cookies to analyze usage and to keep you signed in. We use Google Analytics for access analysis, which collects data through cookies; this data does not include information that identifies individuals.
• You can refuse this data collection by disabling cookies in your browser settings.

5. Contact

For questions about this Policy, please contact us using the form below.

Contact Form

6. Changes to This Privacy Policy

We may change this Policy as necessary.
Any changes take effect when the revised Policy is posted on this page.

This is an English translation of the Japanese Privacy Policy. If there is any difference between the two, the Japanese version prevails.