I think that your use case is not what multiple "accounts" would be designed for. Have you tried keeping multiple backups, one for Japan and one for USA? That

I think that your use case is not what multiple "accounts" would be designed for. Have you tried keeping multiple backups, one for Japan and one for USA? That seems like it would work, but be extraordinarily terrible! As for multiple accounts, they exist on iOS. You just have to be managing the devices for education: https://help.apple.com/deployment/education/#/cad7e2e0cf56 https://help.apple.com/deployment/education/#/cad7e2e0cf56 When I mentioned multiple accounts, I meant on AppleTV. AppleTV can switch accounts in "consumer mode" so each person gets their "personalized experience" Honestly, it's a mess. But they can improve by working on it and paying attention to real-world situations.