An estimation program causing a computer to execute a step (S104) of acquiring a learned detection model and a constituent component model, a step (S202) of outputting constituent component detection results based on the new image using the learned detection model, a step (S203) of estimating first primary component candidates based on the constituent component model and the constituent component detection results and sorting out a secondary component not registered with a list of the first primary component candidates, a step (S204) of merging a plurality of the first primary component candidates to generate a second primary component candidate, and a step (S205) of selecting a secondary component matching the second primary component candidate from among a plurality of secondary components sorted out and registering the selected secondary component with the second primary component candidate.