A sheet post-processing apparatus includes a punching unit, an end-binding unit which aligns end portions of a sheet bundle piled on a processing tray and performs a stapling process, and a middle-binding and middle-folding unit which performs a stapling process on the center of the sheet bundle and then folds centering around the stapling portion to be in a brochure form. The process is carried out in such a way that consecutive images are recorded in overlapping areas of the spatial frequency space and, additionally, in areas of the spatial frequency space that differ from each other. A second component is disposed concentrically around the first component and configured for power coupling with the first component.