An API classification unit (231) extracts as omittable internal data processing, from among internal data processing included in execution data processing which is data processing executed by an outside data processing device which is a data processing device outside, internal data processing that is required to be executed when the outside data processing device executes the execution data processing, but is omittable from the execution when a data processing apparatus (10) executes the execution data processing, due to a difference in an execution environment between the outside data processing device and the data processing apparatus (10). An execution unit (235) executes the execution data processing while omitting the execution of the omittable internal data processing extracted by the API classification unit (231).