Abstract
According to the national census performed in last October, Japan entered population decline society. A trend of population of man and woman is shown until 2060. A calculation results are show every five years. The population is classified in an age-grade every 5 years old. The population of 5 years old rank is divided into man and woman, and resulting figures are shown. Aging rate is obtained based on the constitution of population. We can predict a death toll of the modern Japanese three major cases of deaths (malignant neoplasms, heart diseases, cerebro-vascular diseases) by using the death rate for three dieses for every age-grade.
