Learn in the textbookRules for Handling Personal Information — Consent, Third-Party Provision, and Processing
DefinitionOpt-out (オプトアウト) is a method where use or sending of personal information starts without waiting for the person's prior consent, and stops once the person makes a request to stop.
ExplanationThe person is told in advance what the data is for and how to stop it, and once a request arrives, use or provision stops from then on. Under the Act on the Protection of Personal Information, giving personal data to a third party this way requires not only notifying the person or taking similar steps but also filing a notification with the Personal Information Protection Commission.
AnalogyIt is like a neighborhood circular passed from door to door. It goes to every household from the start, and only homes that say no are taken off the route.
Memory hookTo opt out is to choose to step outside. You start inside, and it is your own request that takes you to the exit.