PROBLEM TO BE SOLVED: To restructure a parent population from a small number of samples while preventing the calculation amount from increasing.SOLUTION: A whitening processing unit 152 of a parent population generation device 100 whitens sample population information 142. A specification unit 153 of the parent population generation device 100 specifies neighborhood points existing near each of the points in the whitened sample population, and generates k neighborhood information 143. The generation unit 154 of the parent population generation device 100 refers to the k neighborhood information 143, and selects a point included in the whitened sample population and the neighborhood points corresponding to this point. On the basis of the selected point and the distribution of the neighborhood points, the generation unit 154 repeats the processing of generating a new point to generate a parent population.SELECTED DRAWING: Figure 1
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