CONTENTS' RELATIONSHIP VISUALIZING APPARATUS, CONTENTS' RELATIONSHIP VISUALIZING METHOD AND ITS PROGRAM

There is provided a contents' relationship visualizing apparatus including a usage history acquiring unit for acquiring usage histories of multiple contents, a users' set specifying unit for specifying a content's users' set indicating users utilizing each content by use of the contents' usage histories, a similarity calculating unit for calculating a similarity between the specified users' sets by use of a similarity index, and a network creating unit for creating a network indicating a relationship between the contents by use of the calculated similarity between the users' sets.