The history of the human race has been a long and continuous battle against illness and disease. Although the steady development of new drugs has made it possible to control and eradicate a vast number of diseases, there are still many diseases that continue to threaten mankind. At Nippon Zoki Pharmaceutical Co., Ltd., we are engaged in a systematic study of the human body's self-defense mechanisms and healing ability during illness. Our aim is to develop new and effective drugs that help the body to recover by attacking only the disease without having any effect on healthy tissue.. Primary emphasis is placed on studying the nervous system and the immune system, which play an important role in maintaining the homeostasis of living organisms. By discovering and analyzing the natural bio-active substances involved in regulatory functions of the body and, more specifically, in the repair of damaged cells, we have made a number of breakthroughs in the development of therapeutic drugs for intractable diseases.