Morbidity and use of medical care were studied to obtain adequate health indicators of community health in a remote island (Kudaka Jima) in Okinawa Prefecture. It is a typical remote island with its area of 1.5 square kilometers. Population of the island has been continuously decreasing since some 16 years ago, and in the present it is about 400 and is mainly composed of children and old people. So far, the islanders came from and moved to 18 districts in the main island of Okinawa. Among these districts M District in Naha City and Y Town are prominent in terms of number of people who came in and moved out. When people of this island get sick, they usually visit their relatives who reside in the main island and go to hospitals in the same district. A home-visit survey was conducted and it revealed that the main purpose of the people who visited their relatives in Y Town was to get medical care in an early stage and 80 percent of them came back to their own island in the same day. On the contrary, in cases of the islanders to Naha City, they had compartively severe diseases and stayed there one to two days in 61 percent and five days or more in 30 percent.
Health surveys were made on the bights, weights, blood pressure, electrocardiogram, chest X-ray etc. of about 1400 junior and senior high school boys, 12-17 aged, in Tokyo city, in April 1976. The results were as follows : 1. The frequency distribution of arterial blood pressure showed standard normal distribution curves. 2. The Means and Standard Deviations of systolic blood pressure were 116.41 ±11.20 in junior high school boys, and 128.33±12.48 in senior high school boys. The Means and Standard Deviations of diastolic blood pressure were 67.17±9.77and 72.72±11.03 respectively, and the blood pressure gradually increased with age. 3. According to the modified Minnesota code critetia major electrocardiographic findings were 8.4% right axis deviation, 3.3% PQ prolongation, 2.21 complete or incomplete right bundle bolck, and 1.4% sinus bradycardia. 4. According to the modified classification of essential hypertention of the I WHO Expert Committee, the population were divided into three groups with respect to the Means and Standard Deviations of the respective school age.The normotensive group (under Mean) was 72.1%, boderline hypertensive group (within+1 S. D.) 23.2%, and hypertensive group (above+ 1 S. D.) 4.7% 5. It was shown that the blood pressure correldted with the Rhorer's Index, when overweights were defined above Rhorer's Index 136 (junior hgih school boys), and 146 (senior high school boys), overweights were found more frequently in the hypertensive than in the normotensive groups (p<0.01) .
The record of family registration of 776 couples who were legally registered(HONSEKI) in Sendai city were analyzed. The couples whose grooms were born in 1926 and later who had got married between 1945 to 1974 in first marriage and who had at least two children were randomly selected from a regional frame in Sendai city. The period between the date of registration of wedding and that of notification of birth of first child is determined by the duration of de facto but not de jure marriage (NAIEN). In Japan the period of temporary informal marriage tended to be prolonged in many couples, keeping under the juridical and customary restraint, before the new civil law enacted 1948. The period between the date of registration of wedding and that of notification of birth of first child is determined by the duration of de facto but not de jure marriage (NAIEN). In Japan the period of temporary informal marriage tended to be prolonged in many couples, keeping under the juridical and customary restraint, before the new civil law enacted 1948. Though the majority of our samples had got married after the establishment of the law, some of them might do all that were required by the conventionalities. Under these social circumstances, our results of survey are as follows: 1) The intervals between date of registration of wedding and occurence of birth of first child of two age groups were compared with cumulative percentage of duration. The interval from registration of marriage to birth of the first child was shorter for the couples whose grooms were under age 25 at the time of wedding than those whosegrooms were age 25 and over throughout the observation periods. 2) When the couples were classified by the periods, 1945-54, 1955-64, 1965-74 of their date of registration of wedding, the said intervals had been prolonged through the descent periods successively. 3) In the form of notification of birth, it is requested to fill up the date of start of cohabitation. With the view of comparing the length of informal marriage, 352 notifications of first birth in 1974 were examined. Parents of these children were dwellers in Sendai city, and their fathers were born in 1926 and later. It was shown that the intervals from the beginning of cohabitation to birth in these 352 couples were longer than the intervals derived from the couples of legal registration(HONSEKI)