Yonaguni-Island in Okinawa is much particular in the sense that it is situated at the most western in Japan. The authers reffered all the marriage-pairs in this island concerning their birth places, permanent addresses, present address and the year of the marriage, And they were classified according to each categories . By analyzing the data, we obtained the several facts. At the first, the marriage within the island has gradually decreased in these 25years. On the contrary, the number of the marriage with the other Okinawa area has been increasing. Furthermore, limiting within the island, the number of the inter-village marriage has increased, and that of the within each village has decreased. Secondary, there are 427 married-couples at Dec. 1976 in Yonaguni-island . In Sonai, the largest village in the island, 65.5%is the pair which both man and wife were born in this same village. In Higawa, 50% is so. But in Kubura, the pair both are born in this village is amount only to 7.8%. In the aspect of the geographical distribution, Yonaguni-Island was so isolated in the old days. Nowadays, however, most of the young are married with people born outside of the island. In addition, it seems useful to appreciate other findingseg, sero-epidemiological or dietary findings, in terms of the fact these 3 villages show a different pattern con cerning the birth place and the residence.
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