Studies have been made since 1949 on 201 white American-Japanese and 66 Negro-Japanese hybrids in the Tokyo area and in Kanagawa Prefecture. They were all under six years of age, and their mothers were invariably Japanese. The results are as follows:
(1) Blood type. The figures for B and O types respectively stand about halfway, between the corresponding figures for the two races. The racial blood index of the white American-Japanese is 2.93, showing a European type, while that of unmixed Japanese stands at 1.35 and is consistently Asiatic. The racial serologic point of the hybrids, as Figure 1 shows, stands at about the midpoint between the two races (Table 1). (2) Dermatoglyphs. Hybrids show the middle percentage of the pattern of two races (Table 2 and 3). (3) Color of skin. By comparison with Hintze's Color Table, we have ascertained that, the skin of the American-Japanese hybrids is 13% whiter than that of unmixed Japanese, and is 2.4% less white than that of white race. Namely in color, it is very near to that of whites and is almost devoid of the characteristic yellowish shade (Table 5). (5) Color and form of hair. About half (52.2%) of the American-Japanese hybrids have black hair, and 11% blond hair. The hair of 60% of the American-Japanese hybrids is straight and that of 14% slightly curled. On the whole, the hair is more wavy in form thanit is intermediate between the two races. (6) Color of iris. A majority (88%) of the American-Japanese hybrids possess a black iris, with only a minority (0.4%) having a bluiush one. It is concluded that the black color of iris is one of the most dominant hereditary factors of the Japanees race in crosses involving the white race (Table 6). (7) Mongolian fold. The Mongolian fold is found in 21.8% of the hybrid children as much as the ratio of Japanese children having the fold at the same age is 23% (Table 7). (8) Stature and weight. An examination of stature and body weight of hybrid children shows that they are about the same as Japanese children in both measurements, but are smaller and lighter than white children. The cephalic index tends near to that of white children. The curve of the nose index and the facial index transverse an intermediate zone between the ranges of both races. (9) Mental tests and deformities. The intellingence quotients are a little lower -by 5 on the average- than comparable figures for Japanese natives. In all there have been three cases of hernia, one case of syndactylism, three cases of idiocy. It is believed that such deformities have been caused through the various operation during the pregnancy.

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This paper is one of several reports of ecological cooperation between cultural and physical anthropologists in Sata-Mura, Kagoshima Prefecture, in the spring of 1953. Resaerch was conducted on inhabitants, male and female of all ages except pre-school children, engaging in agriculture involving heavy labour and with little contact with urban civilization. The following simple tests were selected because research was conducted in the field: (1) tapping (manual repetition of motor speed), (2) picking up balls (finger dexterity), (3) match board (manual dexterity), (4) reaction time; measured by getting the subject to pick up a stick dropped suddenly, (5) Burpee test (body agility), (6) static balancing (testing the length of time the subject can stand tiptoe on a bar) and (7) closing one eye (the development of the mimic muscles). (3) and (5) were applied only to children.
As a rule children attain the adult level of motor performance at 15 years of age when most of them finish their compulsory schooling and start full-time agricultural labour, Their contemporaries who advance to a higher level of schooling progressively improve. Some decline of performance appears at about 40-50 years of age, and is especially notable in (6), while the older people show constancy in (7) and (2) as long as they can work, exclusive of abnormal conditions. Individual variation seems to become greater toward the close of life, some old people being quite lively while others are less so. In general, sexual differences are not noticeable in (2) and (3). With regard to (1), (4) and (5), males excel females. (6) and (7) show that girls are somewhat superior to boys, but this relation is reversed after adolescence. Possibly girls are more adapt in static balancing and boys in dynamic, but women may lose their superiority after the onset of menopause for physiological and psychological reasons. Labour activity among agricultural people is not only closely linked with the motor performance as mentioned above, but is also based on physical strength and endurance, factors which were not measured. I believe that the relationships of physical capacity and labour longevity to culture are important from an ecological point of view. Senile phenomena are what the complex of the individual experience the culture of a community and the natural environments elaborate upon the human organism.
I suggest that a gerontological approach provides us with the necessary means of resolving the problems of contact among the physical, mental and cultural entities of a human being.

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In 1933 the author measured 1250 Koreans inhabiting Pyengyang and its neighbourhood. Of the total, 1025 males and 82 females were natives of South Phyeng-an Province and 143 females were from other parts of Korea. The results are tabulated in the text.

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I bought a manuscript some days ago and found in it some descriptions on the population of each Province (Kuni) of Japan in the year 1721, the first census in the Tokugawa Period, which has not been known, hetherto, to the present time scholars. The numerals will be seen in the Japanese text.

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The site, located on the north-eastern part of Odawara city in Kanagawa Prefecture, yielded earthenware of the Jõmon-, Yayio-, Sue- and Haji-types as wel as iron slag, charcoal, animal bones, etc..

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