A medium processing apparatus (3) includes a liquid applier (31, 131, 140, 612), a post-processing device (32, 32', 62), and a controller (100b). The liquid applier (31, 131, 140, 612) applies liquid on at least one medium (P). The post-processing device (32, 32', 62) performs a combination of various types of post-processes including a liquid application crimp binding and a crimp binding and a various types of bindings including a dual binding, a parallel binding, and an oblique binding, on a bundle of media (Pb) including the at least one medium (P) for a number of times. The controller (100b) is to change the number of times of the post-process according to the combination of the various types of the post processes and the various types of bindings, to be performed.