From A People and a Nation, an American History textbook:
"During the war, the government interned 14,426 Europeans in Enemy Alien Camps. Fearing subversion from aliens born in enemy countries, the government also prohibitied ten thousand Italian Americans from living or working in restricted zones along the California coast, including San Francisco and Monterey Bay."
"...the internment in 'relocation centers' of, ultimately, 120,000 Japanese Americans. Of these people, 77,000 were Nisei--native born citizens of the United States....in 1942 all the 112,000 Japanese Americans living in California, Oregon, and the state of Washington were round up and imprisoned."
(Nisei is the term for the first generation of children of Japanese immigrants. By the way, the Nisei were not initially at the camps of their own will, it was only after I believe 6-12 months at the camps that they were given freedom to leave while the non-citizen Japanese remained imprisoned.)
"General John L. DeWitt, chief of the Western Defense Commmand, warned, 'The Japanese race is an enemy race and while many second and third generation Japanese born on United States soil, possessed of United States citizenship, have become 'Americanized,' the racial strains are undiluted....It, therefore, follows that along the vital Pacific Coast over 112,000 potential enemies, of Japanese extraction, are at large today.'"
From the same general:
"'The very fact that no sabotage [by Japanese Americans] has taken place to date is a disturbing and confirming indication that such action will be taken.'"
"During the war, charges of criminal behavior were never brought against any Japanese Americans; none were ever indicted for espionage, treason, or sedition"
""The camps were bleak and demoralizing. Behind barbed wire stood tarpapered wooden barracks where entire families lived in a single room furnished only with cots, blankets, and a bare light bulb. Toilets and dining and bathing facilities were communal; privacy was almost nonexistent. Japanese Americans were forced to sell property valued at $500 million, and they lost their positions in the truck-garden, floral, and fishing industries. Indeed, their economic competitors were among the most vocal proponents of their relocation."
"In 1983, forty-one years after he had been sent to a government camp, Fred Korematsu had the satisfaction of hearing a federal judge rule that he--and by implication all detainees--had been the victim of 'unsubstantiated facts, distortions and misrepresentations of at least one military commander whose views were affected by racism'....Finally, in 1988, Congress voted to award $20,000 and a public apology to each of the surviving sixty thousand Japanese American internees."