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Data for Japan are used to examine the relationship between causes of death and environment. After undertaking a principal component analysis, the authors apply a varimax rotation to statistical data for 1970 and 1975 for Japanese prefectures, using 12 major causes of death and 7 socio-geographic conditions as variables. Three major factors affecting mortality are identified: disease patterns possibly associated with urbanization, disease patterns possibly associated with temperature, and characteristics peculiar to rural areas in northern Japan.

A Study of the Death Rate in Japan Based on Cause and Social Environment