In 1999, the 4th report of the discussion group on 21st century medicine and health care proposed that it was necessary to establish in medical education a core curriculum emphasizing carefully selected basic content and to greatly expand the number of subjects that students might take electively. Following this report, a model core curriculum was made by the research and development project committee for medical educational programs in 2001. Similarly, the necessity of establishing a standardized postgraduate training curriculum and system has been discussed for many years. The Departments of Education and Technology and Welfare and Labor proposed a new curriculum named "Objectives in postgraduate clinical training" in order to ensure the quality of the medical doctors licensed to practice medicine in postgraduate clinical training in 2002. Following this new curriculum, Nihon University School of Medicine revised and enlarged its postgraduate program. All graduates are required to enter a full rotation program including general disciplines for two years. In addition to this basic curriculum, an elective curriculum will be added, providing attractive training programs based on medical trainees' needs. The training program in Laboratory Medicine is administered in the 2nd year as an elective program.