The National Institute of Population and Social Security Research was established as a national institution for policy studies under the Ministry of Health, Labour and Welfare in December 1996. We are conducting research on the socioeconomic background of changes in Japanese population and projecting the future national population. In addition, we are conducting research in various fields of social security, such as pension, medical care, long-term care, and child care. Also, we are conducting theoretical and empirical research to clarify the interrelationship among population, economy, society, and social security.