An attribute linkage apparatus (20) transmits attribute information managed by each of a plurality of data management apparatuses (30) to a certain data management apparatus (30) and causes the data management apparatus to specify an access condition to data according to the attribute information and then store the data. The attribute linkage apparatus (20) transmits access information in which attribute information relating to a target user out of the attribute information managed by each of the plurality of data management apparatuses (30) has been set to a certain data management apparatus (30), and causes the data management apparatus to determine whether the access condition is satisfied according to the access information and control an access to data.