One or more pieces of product information each having a product identifier and specifying image information are stored in a product information storage unit. A product identifier acquiring unit detects, at least two images that are to be analyzed, that there are images of products corresponding to one or more pieces of product specifying image information, using the stored pieces of product specifying image information, and acquires one or more product identifiers corresponding to the images of the products. A personal attribute value acquiring unit acquires one or more personal attribute values from the least two images that are to be analyzed, and a personal attribute value-related information accumulating unit accumulates the one or more product identifiers acquired by the product identifier acquiring unit and personal attribute value-related information, in association with each other, the product identifiers and the personal attribute values being information acquired from a same image.