1.Population of Akiyama, a small and remote mountain village in the border between Etigo and Sinano, was studied by Sex and Age Group in comparison to the population of all Japan and Etigo (Niigata-ken) and Sinano (Nagano-ken).The whole population is only about 1400.
The results are shown in Table 1-4.
2.The sex ratio in younger generation is almost the same as in other districts, but in advanced age, it shows unfavorable figure for the females.The more advanced the age, the more unfavorable for the females.
In Japan it is usual that in advanced age the population of the female is more than the male and the more advanced the age the more fayorable for the female.Over 90 years of age the ratio of female to male is 3: 1 or more, but in Akiyama it is 8: 14 (0.58) in the age of 80-89 years group.No man over 90 years of age was found.The oldest was a 87 year male.
3.The list of the eldest age of both sex in each community is shown in Table 4.The number of communities, where the eldest person is the male is 11, whereas those of the female is 5: the ratio is 2.2.Moreover the average age of the eldest persons in all communities is 75.8 for the female, 76.6 for the male: difference is 0.8 years, advantageous for the male.
4.This result shows that this region is not only unfavorable for the females than the males but also is unfavorable for the both sex to live long.
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