A player (content searching device) compares an acquired piece primary metadata (with running number 100) to a corresponding piece of primary metadata having number 100 in a memory unit. When no matching occurs, primary metadata with running number 99 is used. Then, this acquired primary metadata is compared to the piece of primary metadata having number 100 in the memory unit. When matching occurs, the player acquires content corresponding to running number 99 from a server and begins playback.