"The [woman] on the left, and her children, show representative Ainu physical traits, while her cousin, on the right, and her children have typically Japanese features. The husbands followed the patterns: the [woman] on the left married an Ainu-appearing man; the [woman] on the right, a Japanese man, May 30, 1948.

From: Bennett, John W. "Doing Photography and Social Research in the Allied Occupation of Japan, 1948-1951: A Personal and Professional Memoir." http://library.osu.edu/sites/
rarebooks/japan/2_4_photos.html