Abstract
This paper analyzes Japanese medical systems based on an economic metrical theory for both small organizations and national economies. From the macroscopic point of view, through regression analysis, the National Medical Care Expenditure of Japan is proved to be a linear increasing function of the Medical Workers Number, where the former may be proportional to the latter if the effect of inflation is filtered out; also, the proportion of the National Medical Expense for Workers to that for Facilities is proved to be strictly 1 to 1. These results bring us important implications for the medical policies of Japan. We can conclude that the Number of Medical Workers must be reduced if the National Medical Care Expenditure of Japan is reducing, but it is equally clear that this policy might significantly decrease Japanese national welfare. We must be prudent about changing public systems.