1. A magnetic resonance imaging apparatus (MRI) comprising: an imaging unit which performs MR imaging more than once with respect to an imaging target while changing a central frequency of a fat suppression pulse sequence utilized in an MRI scan each time imaging is performed; a generation unit which generates a plurality of reconstructed MR images based on magnetic resonance signals obtained by MR imaging being performed more than once; and a calculation unit which calculates factor information, which contributes to spatial inhomogeneity of a fat suppression effect based on the plurality of reconstructed MR images, and storing or outputting said factor information.