Cookie Policy
The cookies and browser storage used by Japanese System for sign-in, consent, and optional conversion measurement.
Last updated: September 1, 2026
This page is provided for transparency and platform readiness. It is not a substitute for legal advice from a qualified lawyer.
1. What cookies are
Cookies are small files stored by your browser. Similar browser storage, such as local storage, can remember choices on your device. Japanese System uses these technologies for sign-in, security, consent, and optional conversion measurement.
2. Cookie types we use
- Essential cookies for Supabase authentication and secure signed-in sessions.
- Local storage for remembering whether you accepted or rejected optional cookies.
- Optional Google Ads and measurement cookies, loaded only after you accept optional cookies.
3. Cookie inventory
| Name | Type | Purpose | Duration | How to opt out |
|---|---|---|---|---|
| Supabase auth cookies | Essential | Maintain signed-in sessions and refresh authentication tokens. | Session or persistent, based on Supabase session configuration. | Required for account features. Sign out or clear browser data. |
| japanese-system-cookie-consent | Functional local storage | Remembers your accept or reject choice for optional cookies. | Until browser data is cleared. | Clear site data to reset your choice. |
| _ga, _ga_* | Optional analytics | Google measurement cookies used for aggregate traffic and conversion reporting. | Usually up to 2 years. | Reject optional cookies, install Google's opt-out add-on, or block cookies. |
| _gcl_* | Optional advertising measurement | Google Ads conversion measurement for Chrome Web Store clicks. | Usually up to 90 days or as configured by Google. | Reject optional cookies or block advertising cookies in your browser. |
4. Consent
Essential cookies are necessary for signed-in functionality. Optional Google measurement and advertising cookies are loaded only after you accept them in the cookie banner. If you reject them, Chrome Web Store clicks still work, but conversion reporting is disabled.
5. Third-party cookies
Google may set optional cookies after consent to measure ad and conversion performance. Supabase may set authentication cookies when you sign in. These providers process cookie data under their own policies.
6. Managing cookies
- Use the cookie banner to accept or reject optional cookies.
- Clear site data in your browser to reset the banner choice.
- Use browser settings to block or delete cookies.
- Use Google's browser opt-out tools for Google measurement cookies.
- Disabling essential cookies may prevent sign-in, dashboard, account, and extension-connect features from working.
7. Do Not Track
Japanese System does not currently respond to browser Do Not Track signals because there is no consistent technical standard. You can reject optional cookies or block cookies in your browser.
8. Updates and contact
We may update this Cookie Policy when cookies or providers change. Questions can be sent to sheru.jp@gmail.com.