Provided are a radiography device, a radiography method, and a radiography program which can obtain an accurate radiographic image while reducing a burden on a subject. A radiography device control unit determines imaging conditions including at least one of resolution or an incident angle range, on the basis of a radiographic image captured before tomosynthesis imaging, and performs tomosynthesis imaging. Specifically, the radiography device control unit controls tomosynthesis imaging (120) such that tomosynthesis imaging is performed under first conditions (108) of low resolution and a narrow incident angle range in a case in which a mutation site suspected as a lesion is not detected and tomosynthesis imaging is performed under second conditions (112, 116, and 118) which are different from the first conditions in at least one of the resolution or the incident angle range in a case in which the mutation site suspected as a lesion is detected.