A controller comprising at least one processor of an information processing apparatus acquires first information about delivery of a specific product that is delivered, on a regular basis, to a specific house where at least one user lives. Furthermore, the controller acquires second information about at least one member who is scheduled to be present in the specific house in a predetermined period. The predetermined period is a period between a scheduled date of next delivery of the specific product to the specific house and a first scheduled date, after the scheduled date, of delivery of the specific product to the specific house. Then, the controller predicts a demanded quantity of the specific product in the specific house in the predetermined period, based on the first information and the second information.