The invention relates to an apparatus for finding a parked vehicle again. The X-ray analysis apparatus of the present invention irradiates a sample with X-rays narrowed down by means of an X-ray guide member from above the sample in which said sample is directly irradiated with X-rays from said X-ray guide member and an optical image of said sample is obtained in the direction coaxial with said X-ray guide member. Expression of the gene is activated or increased following integration, by non-homolgous or illegitimate recombination, of a regulatory sequence that activates expression of the gene.