To provide a DNA synthetic technique capable of exhibiting effect on extinct organisms and therapy for infertility and utilize the technique in all the aspects by applying the technique.

A solving method for developing more difficult DNA synthetic technique is groped by using the DNA synthetic technique as means. Thereby, creation of organisms having possibilities which have not been hitherto found by using DNA synthetic method and the DNA synthetic technique having various high values added by its application are established and the technique contributes to society and exhibits large effects and efficacy to promote development of largely useful technique by bona fide exertion.