The Gentlemen's Agreement of 1907 was an informal agreement between the United States of America and the Empire of Japan whereby Japan would not allow further emigration to the United States and the United States would not impose restrictions on Japanese immigrants already present in the country. The goal was to reduce tensions between the two Pacific nations such as those that followed the Pacific Coast race riots of 1907 and the segregation of Japanese students in public schools. The agreement was not a treaty and so was not voted on by the United States Congress. It was superseded by the Immigration Act of 1924.

The Immigration Act of 1924, or Johnson–Reed Act, including the Asian Exclusion Act and National Origins Act, was a federal law that prevented immigration from Asia and set quotas on the number of immigrants from Eastern and Southern Europe. It also authorized the creation of the country's first formal border control service, the U.S. Border Patrol, and established a "consular control system" that allowed entry only to those who first obtained a visa from a U.S. consulate abroad.