An arrival position information estimation unit that estimates arrival position information at which an extension line of a peripheral branch included in a bronchial region arrives at a surface of a lung region, and estimates assumed mapping information other than the arrival position information of a specific peripheral branch on the basis of a preset condition in a case where the specific peripheral branch is set as a target branch, and a display control unit that generates a mapping image obtained by mapping the arrival position information of the specific peripheral branch and the assumed mapping information to a surface of the lung region and displays the mapping image on a display unit are included.