A data processing apparatus includes circuitry. The circuitry acquires data. The circuitry identifies a type of the data based on text information of the data, the text information being one of text information included in the data and text information converted from the data. The circuitry executes one or more processes on the data according to the identified type to obtain one or more pieces of processed data. The circuitry performs control to output the one or more pieces of processed data, as one or more processing results.