1. An electromagnetic field simulation apparatus, comprising: a memory; and a processor coupled to the memory, wherein the processor executes a process comprising: first generating, by replacing a predetermined region in printed circuit board CAD data to be subjected to an electromagnetic field simulation with measurement data measured by a near-field measurement device, new printed circuit board CAD data; second generating, regarding a measurement data portion in the generated new printed circuit board CAD data, analysis model data by setting, as a wave source, an electric field or a magnetic field measured by the near-field measurement device; and executing the electromagnetic field simulation with respect to the analysis model data having the wave source.