In particular, the Japanese Americans in the army were profitable, because they could translate Japanese documents and monitor radio traffic in the Pacific. Ironically, most Nisei volunteers couldn’t speak Japanese that well, so they had to attend military school to learn thru language. Internment didn’t cover only Japanese Americans in U.S., but it also included Italians in Britain, Japanese in Canada and Europeans in Southeast Asia.
The end of internment in U.S. came in December 1944 when Supreme Court ruled in favor of Mitsuye Endo and declared it unconstitutional. All loyal Japanese Americans were now free to return to their homes on the West Coast, if they had any.
Some had to start their life all over. In 1945, Eugene Rostow, a law professor at Yale University, described the internment as the “worst wartime mistake”.
Yoshiko Uchida, a woman, who was in the internment camp, says in her book The Invisible Thread:
“I also hope they will learn to see Japanese Americans not in the
usual stereotypic way, but as fellow human beings. For although
it is important for each of us to cherish our own special heritage,
I believe, above everything else, we must all celebrate our common
Humanity.”.