Privacy policy

Storage of your answers

This site stores your answer records (correct or incorrect, time answered, and session history) in your browser's localStorage. This data stays on your device and is never sent to our servers. You can delete it with the reset button on the progress page or by clearing site data in your browser.

Personal information

This site has no user registration and does not collect personal information such as names or email addresses for browsing or answering questions.

Contact form

We use an external service (Google Forms) for inquiries. Information you enter is used only to reply and to improve this site, and is not provided to third parties except as required by law.

Advertising and analytics

This site uses Google Analytics to understand how visitors use it. Google Analytics uses cookies to collect information that does not identify you personally, and the data is handled under Google's privacy policy. You can opt out with the Google Analytics Opt-out Browser Add-on. For details, see how Google uses information from sites or apps that use its services.

Hosting

This site is hosted on GitHub Pages. Information such as IP addresses at the time of access is handled by GitHub in accordance with its own policies.

Changes

This policy may be changed without notice when necessary. The revised policy takes effect when it is posted on this page. If this English version differs from the Japanese version, the Japanese version prevails.