Answer
Japanese immigrants and their descendants faced discrimination and prejudice in the United States before Pearl Harbor. The Immigration Act of 1924 restricted Japanese immigration, and many Japanese Americans were denied citizenship and the right to own land. In 1940, the Alien Registration Act required all non-citizen Japanese Americans to register with the government and carry identification cards. These policies were based on the belief that Japanese Americans were a threat to national security and could not be trusted. Primary sources that support this include the text of the Immigration Act of 1924 and the Alien Registration Act of 1940, as well as newspaper articles and political speeches from the time period.