Medical Studies on Rural Welfare at Toshima Island

Part II. On the Composition of Population and the Statistics of the Movement of population

Abstract

The author investigated on the structure and movement of population at Toshima village, Tokyo-To and obtained the followingr esults.
In the construction of population on March 31st 1956, 0.4 age group was 10.8% and 15.19 age group was 5.6%. And rate of construction on age group showed remarkable decrease. Regarding cause of this statues, the former was due to the decrease of birth rate and almost the latter was due to detachment of villagers. Accordingly, percentage of high age group was in high rate.
Population and the number of household had change temporarily after and before the End of War II and on 1947, population increased but after that the author could not find out any remarkable change.
With regard to population trends birth-rate indicated 25.9 in 1950.1955 and this has recently been decreasing. Death-rate showed 10.4 in average for 9 years after the War II and this figure proves higher than 7.8 for throughout Japan. The rate on stillbirth showed 34.5 and death rate of suckling showed 23.0. Both showed rather too low rate. Marriage rate showed 8.9 and divorcement rate showed 0.5. About cause of death, the author did not find any special question. In case of migration, their destinatio ns were concentrated to City of Tokyo and Oshima-Island.