The gentlemen`s agreement of 1907 (1907) was an informal agreement between the United States of America and the Japanese Empire, according to which the United States would not impose restrictions on Japanese immigration and Japan would no longer allow emigration to the United States. The aim was to ease tensions between the two Pacific nations. The agreement was never ratified by the U.S. Congress and replaced by the Immigration Act of 1924. Chinese immigration to California was booming during the gold rush of 1852, but the strict Japanese government practiced a policy of isolation that thwarted Japanese emigration. It wasn`t until 1868 that the Japanese government lifted restrictions and Japanese immigration to the United States began. The anti-Chinese atmosphere motivated American entrepreneurs to recruit Japanese workers.  In 1885, the first Japanese workers arrived in the then independent Kingdom of Hawaii.