Japanese American Internment - After Pearl Harbor

After Pearl Harbor

The attack on Pearl Harbor on December 7, 1941 led military and political leaders to suspect that Imperial Japan was preparing a full-scale attack on the West Coast of the United States. Japan's rapid military conquest of a large portion of Asia and the Pacific between 1936 and 1942 made its military forces seem unstoppable to some Americans. Civilian and military officials had serious concerns about the loyalty of the ethnic Japanese after the Niihau Incident which immediately followed the attack on Pearl Harbor, when a civilian Japanese national and two Hawaiian-born ethnic Japanese on the island of Ni'ihau violently freed a downed and captured Japanese naval airman, attacking their fellow Ni'ihau islanders in the process.

Several concerns over the loyalty of ethnic Japanese seemed to stem from racial prejudice rather than evidence of actual malfeasance. Major Karl Bendetsen and Lieutenant General John L. DeWitt, head of the Western Command, each questioned Japanese American loyalty. DeWitt, who administered the internment program, repeatedly told newspapers that "A Jap's a Jap" and testified to Congress,

I don't want any of them here. They are a dangerous element. There is no way to determine their loyalty... It makes no difference whether he is an American citizen, he is still a Japanese. American citizenship does not necessarily determine loyalty... But we must worry about the Japanese all the time until he is wiped off the map.

DeWitt also sought approval to conduct search and seizure operations aimed at preventing alien Japanese from making radio transmissions to Japanese ships. The Justice Department declined, stating that there was no probable cause to support DeWitt's assertion, as the FBI concluded that there was no security threat. On January 2, the Joint Immigration Committee of the California Legislature sent a manifesto to California newspapers which attacked "the ethnic Japanese," who it alleged were "totally unassimilable." This manifesto further argued that all people of Japanese heritage were loyal subjects of the Emperor of Japan; Japanese language schools, furthermore, according to the manifesto, were bastions of racism which advanced doctrines of Japanese racial superiority.

The manifesto was backed by the Native Sons and Daughters of the Golden West and the California Department of the American Legion, which in January demanded that all Japanese with dual citizenship be placed in concentration camps. Internment was not limited to those who had been to Japan, but included a small number of German and Italian enemy aliens. By February, Earl Warren, the Attorney General of California, had begun his efforts to persuade the federal government to remove all people of Japanese heritage from the West Coast.

Those that were as little as 1/16 Japanese could be placed in internment camps. There is evidence supporting the argument that the measures were racially motivated, rather than a military necessity. For example, orphaned infants with "one drop of Japanese blood" (as explained in a letter by one official) were included in the program.

Upon the bombing of Pearl Harbor and pursuant to the Alien Enemies Act, Presidential Proclamations 2525, 2526 and 2527 were issued designating Japanese, German and Italian nationals as enemy aliens. Information from the CDI was used to locate and incarcerate foreign nationals from Japan, Germany and Italy (although Germany and Italy did not declare war on the U.S. until December 11).

Presidential Proclamation 2537 was issued on January 14, 1942, requiring aliens to report any change of address, employment or name to the FBI. Enemy aliens were not allowed to enter restricted areas. Violators of these regulations were subject to "arrest, detention and internment for the duration of the war."