In 1961, President Kennedy named Edwin O. Reischauer the U.S. Ambassador to Japan. Already deeply intimate with the country, Reischauer hoped to establish a more equal partnership with Japan, which had long been maligned in the American imagination. Reischauer pushed his fellow citizens to abandon caricature and stereotype and recognize Japan as a peace-loving democracy. Though his efforts were often condemned for being "too soft," the immensity of his influence (and the truth of his arguments) can be felt today.

Having worked as Reischauer's special assistant in Tokyo, George R. Packard...