1. An identification apparatus, comprising: data obtaining circuitry that obtains input data; feature quantity obtaining circuitry that obtains a feature quantity corresponding to the input data; a plurality of classifiers that receives input of the feature quantity, performs classification based on the input feature quantity, and outputs a single first class value, which is a value corresponding to a class obtained by the classification, respectively; identification circuitry that inputs the feature quantity into each of the classifiers, and generates a second class value, which is a single classification result, based on a plurality of the first class values obtained from the classifiers; and reliability generation circuitry that generates a reliability of the second class value based on variations across the plurality of the first class values, wherein the reliability generation circuitry generates the reliability so that the magnitude of the variation of the plurality of the first class values and the magnitude of the reliability of the second class value have a negative correlation.