Following World War II, the Allied Powers occupied Japan from 1945 to 1952, leaving a human legacy: thousands of children of Japanese mothers fathered by men from Australia, the United States, New Zealand, India, and Britain. These mixed-race offspring, and often their mothers, faced intense discrimination. Based on interviews with or research on 150 konketsuji--a now-taboo word for "mixed-blood" Japanese--journalist Walter Hamilton...