An acquisition processing section acquires information data addressed to a user and a notification processing section gives notification of the acquired information addressed to the user. When a plurality of users have logged in concurrently, the notification processing section gives notification of user identification information identifying the addressee of the information, along with the information. On the other hand, when only one user has logged in, the notification processing section gives notification of the information but does not give notification of the user identification information. A login managing unit manages login users. The notification processing section determines whether or not to give notification of the user identification information depending on whether one user or a plurality of users are managed by the login managing unit.