Abstract: A demand prediction device of the present disclosure includes an information acquisition means that acquires deviation information indicating a deviation from an actual demand of a target product and a sales quantity, a correction means that corrects the sales quantity based on the deviation information, and a generation means that generates a demand prediction model based on learning data including the corrected sales quantity.

Abstract: A demand prediction device of the present disclosure includes a model acquisition means that acquires a single article prediction model that predicts a demand of a target product and a category prediction model that predicts a demand of a category including the target product, a calculation means that calculates accuracy of demand prediction of the target product in the single article prediction model and the category prediction model, and an adoption means that adopts any one of the single article prediction model and the category prediction model based on the accuracy.