Korematsu v. United States, 323 U.S. 214 (1944) is a U.S. Supreme Court case related to the forcible internment of Japanese Americans during World War II.
After Japan bombed Pearl Harbor, the United States entered World War II and forcibly interned about 120,000 Japanese Americans living on the Pacific coast at the time in deserts such as Nevada. Two-thirds of them were legal U.S. citizens born in the United States. The reason for the forcible internment was that the loyalty of Japanese Americans to the United States was questioned, such as by acting as spies for an enemy country (Japan). At the time, the United States was at war with Germany and Italy, but the same forced internment was imposed on German-Americans and Italian-Americans in the United States. No action was taken. Mr. Korematsu, a Japanese American who opposed these measures, filed a lawsuit in court.
The Supreme Court ruled that the federal government's forced relocation order was constitutional because it met the “strictness standard” as a measure desperately needed to maintain national security.