NagameAlert
Cookies
Information about cookies and local storage used by the current public version.
Prior choice
Google Analytics 4 is not loaded until “Accept analytics” is selected. “Reject analytics” is available at the same layer and with the same prominence. Rejection creates no Analytics pings or cookies. The choice can later be changed through “Cookie settings” in the footer.
Necessary technical cookie
Cloudflare may create __cf_bm to detect and mitigate malicious automated traffic. It is strictly necessary to protect the service, is not used for NagameAlert analytics and expires after 30 minutes of inactivity.
Google Analytics cookies
After acceptance, Google Analytics may create _ga, which distinguishes users, and _ga_8F4J3B7JPV, which maintains session state. Their default duration is 2 years. Configured measurement covers page views and outbound clicks; automatic scroll, site search, form, video and download measurement is disabled.
Consent preference
NagameAlert stores the key nagamealert.analytics-consent.v1 in localStorage with the choice, version and date. It contains no personal identifier and is treated as expired after 24 months.
Navigation deduplication
After analytics is accepted, the tab temporarily stores nagamealert.analytics-page.v1 in sessionStorage with the internal path and no search parameters or personal identifiers. It prevents filter-only changes from being counted as another page and is removed when the tab closes.
Theme preference
The portal stores the theme preference in localStorage under nagamealert-theme. This remains on the device and preserves the selected light or dark mode.
External services
Links to official sources open third-party services, which may apply their own policies when visited.
Advertising
NagameAlert does not use advertising, remarketing or ad-personalisation cookies or scripts.
Last updated: 9 September 2026.