PRIVACY

Your journey stays yours.

What Prefecture Mate stores

Your account email, display name, manual visit records, CHUNITHM clear records, and—only after an optional sync—normalized player profile information.

What it does not store

Prefecture Mate does not store your SEGA ID, SEGA password, raw CHUNITHM cookies, or raw authenticated pages in its database. The usual import is a bookmarklet: you sign in on CHUNITHM-NET, and Prefecture Mate receives only the player-data and 全国行脚 pages long enough to parse them.

Prefecture Mate sign-in on this device

The sign-in page always keeps your email in this browser so the form can fill it next time. If you choose Remember me, Prefecture Mate keeps you signed in on this device after you close the browser. Leave it unchecked on a shared device. This is separate from optional CHUNITHM-NET password login, which is off unless enabled for your account.

Restricted CHUNITHM-NET password login

Most accounts never send a SEGA password to Prefecture Mate. If password login is enabled for your account and you choose Remember this login, Prefecture Mate encrypts your SEGA ID and password on the server and keeps only that encrypted blob in this browser. It is not saved to your account. Logging out, disconnecting CHUNITHM-NET, clearing all data, signing in with a different SEGA ID, or deleting your Prefecture Mate account removes it. Credentials exist in server memory only for that active sync request.

Temporary sync sessions

If an account has multiple AIME cards, encrypted session material may be retained for up to five minutes so you can choose a card. The browser never receives raw CHUNITHM cookies.

Control of your data

You can export your tracker or delete your Prefecture Mate account. Account deletion removes application data; it does not affect CHUNITHM-NET accounts.