Importance

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Abstract

A time storage unit (102) stores, for each of products included in a predetermined product group, an assumed time that is assumed to be required from start of usage of a product until end of usage of the product. A history storage unit (101) stores history information including a user identifier of a user who purchased any of the products included in the product group, the purchased product, a purchase date and time. An estimation unit (103) acquires history information associated with a user identifier of a recommendation-receiving user, and estimates, from the history information, a usage-end date and time of a most recently purchased product based on a usage time required from start of usage by the recommendation-receiving user of a product other than the most recently purchased product until end of usage thereof and an assumed time. A presentation unit (104) selects, from the product group, a product other than the most recently purchased product, and presents a message recommending the other selected products at the estimated date and time.

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First Claim