Masao Kawai (河合 雅雄, Kawai Masao, January 2, 1924 – May 14, 2021) was a Japanese primatologist,[1] who introduced the concept of kyōkan as a means of studying primates in his book Life of Japanese Monkeys (1969).
He was taken tuberculosis at 9 years of age, and had been absent from Middle School by pleuritis.
Due to his health condition, he was out of conscription at the time of Pacific War.
Masao became a research assistant of Hyogo Prefectural University of Agriculture in 1952.
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