The 21st century will be called the century of life science. In fact, an enormous amount of money has already been reinvested for research in this field on a global scale. A representative example is the human genome project, which is closing in on the complete deciphering of human DNA. In addition, there was a technological breakthrough toward the end of the 1990s in the field of embryological engineering such as cloning of mammals. There is a sign that the fruit of these studies will spread to the sphere of basic research and medicine.