Trends of epidemics of bovine infectious diseases in Japan were investigated using the incidence rates records during the period 1987 -1993. For example, infectious bovine rhinotracheitis among the virus diseases predominated in spite of extensive control by vaccination. Outbreaks of corona or bovine RS virus infection were widespread in beef cattle colonies. In the case of bacterial diseases, Johne’s disease has recently prevailed nationwide despite the extensive measures of control implemented. Salmonellosis has also spread to adult and growing cattle. These diseases are associated with intensive livestock production and still remain major problems (especially bronchopneu monia, diarrhea and gastroenteritis) for livestock in Japan. On the other hand, the incidence of theileriosis among the parasitic diseases has decreased due to the implementation of effective tickeradication programs.