Abstract: An information processing apparatus that can communicate with plural content viewing apparatuses includes a group registering unit that registers users of the content viewing apparatuses in groups, a sharing-level setting unit that sets sharing level information representing an information sharing level among users belonging to an identical group, a viewing-information receiving unit that receives viewing information of the users, a user-viewing-content managing unit that manages a user viewing content database, a discriminating unit that discriminates, when a viewing information request of another user is received, the other users belonging to a group identical with a group to which the user of the content viewing apparatus at the request source belongs, an information extracting unit that extracts viewing information of the discriminated other users from the user viewing content database, and a viewing-information transmitting unit that transmits the viewing information to the content viewing apparatus at t