KEYFALL Privacy policy

Effective: October 24, 2026. The Japanese version is the official version; this English translation is provided for convenience.

This policy explains how "KEYFALL" (the "Site") handles information about its users.

1. Information we do not collect

The Site has no user registration and does not collect personal information such as your name or email address. Audio, MIDI files and images you load, and their analysis results, are processed only in your browser and are never sent to the Site's server.

2. Information stored in your browser

Settings, scores, analysis results, background images and similar data are saved in your browser (localStorage / IndexedDB) so you can use them next time. You can delete them at any time by clearing your browser's site data.

3. Advertising

The Site uses Google AdSense, a third-party advertising service. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this Site or other websites.

Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to this Site and/or other sites on the Internet. You may opt out of personalized advertising by visiting Google Ads Settings. You can also opt out of third-party vendors' use of cookies for personalized advertising at www.aboutads.info.

For details on how Google uses information, see Google's advertising policies.

4. External services

The Site uses the content delivery service jsDelivr to load the analysis engine and the piano sound. When these are loaded, connection information such as your IP address may be sent to that service.

5. Disclaimer

The Site is not responsible for information or services provided on external sites linked from the Site.

6. Changes to this policy

We may change this policy when necessary. Changes take effect when they are posted on this page.

7. Contact

【ここに連絡先（Xアカウントやメールアドレス）を記入してください】