The Gentlemen's Agreement of 1907 was an informal agreement between the United States and the Empire of Japan by which the United States stopped imposing restrictions on Japanese immigration, and Japan restricted emigration to the United States.
In the agreement, Japan agreed not to process more passports for Japanese citizens who wanted to work in the continental United States, which effectively eliminated any new Japanese immigration to America. In return, the United States agreed to accept the presence of immigrants already living on American soil, allow the immigration of their wives, children and parents and avoid legal discrimination against Japanese children in California schools.