ABSTRACT
1) A field of preventive medicine is extremely wide. We focus on the post-primary clinical training courses executed in the departments of preventive medicine in medical schools, health administration offices in community and ministry, and occupational health.<BR>2) A physician is recommended to choose the department of medical schools after inquiry of the major field such as community health, occupational health, epidemiology or toxicology, etc.<BR>3) The Ministry of Health, Labour and Welfare qualifies physician no later than 5 years after graduation from medical school for employment as a technical officer of specialist.<BR>4) For community health officers, comprehensive knowledge is required.<BR>5) While about 2, 000 physicians are employed as occupational health physicians, a new style of physicians makes contract with several enterprises and sets oneself up as occupational health consultants.