F. WAGENSEIL visited Japan in 1957 for the purpose of resurveying the characteristics of the mixedblood people on the Bonin Islands. The author worked as an assistant for him, and obtained the materials on marriage and childbearing of their descendants. As the introductory notes for the wagenseil's paper, some of the analysis done by the author are shown here.
From 1830 to the present time, selection of mates numbered 202, 95 times for males, 107 times for females. About one thirds were the marriage with blood relation, or the descendants of the Bonin Islands' f reign stocks without blood relation. Among the intermarriages, the complicated cases in which the bride and briagroom had the same three family trees are found. (Fig. 1 & 2)
In 1950, some of the famillies still had dominant European blood with a large number of descendants. The fact that many Japanese immigrants moved in the Islands, influenced the living modes of the Freign stocks, but the segregation of the Japanese was too strong for them to be assimilated into the inhabitants.
The average number of children they had were small compared with those of the Japanese. It may be assumed that the stillborn children or the early infant deaths were lost from their memories. But no real causes have yet been known.
The number of people of the mixed-blood, and their average blood distribution schemes, by calender year, are shown in Table 10 & 11.