An information processing apparatus includes a calculation unit, an information selection unit and an information retrieval unit. The calculation unit calculates a retrieval target level for each information based on time from when the information was stored in the past to the present. The retrieval target level for each information is used to determine as to whether or not each information is set as a retrieval target. The information selection unit selects some of the pieces of information as the retrieval targets based on the retrieval target levels calculated by the calculation unit. The information retrieval unit retrieves the some of the information selected by the information selection unit.