Japan was willing to limit immigration to the United States, but was deeply violated by San Francisco`s discriminatory law, which specifically targeted its population. President Roosevelt, who wanted to maintain good relations with Japan as a counterweight to Russian expansion in the Far East, intervened. While the U.S. ambassador reassured the Japanese government, Roosevelt summoned the mayor and school board of San Francisco to the White House in February 1907 and persuaded them to repeal the segregation order, promising that the federal government itself would address the immigration issue. On the 24th. In February, the gentlemen`s agreement with Japan was reached in the form of a Japanese note agreeing to deny passports to workers who wanted to enter the United States and to recognize the U.S. right to exclude Japanese immigrants who hold passports originally issued in other countries. This was followed by the official withdrawal of the San Francisco School Board`s ordinance on March 13, 1907. A final Japanese note dated 18 Feb. 1908 rendered the Gentlemen`s Agreement fully effective. The agreement was replaced by the Immigration Exclusion Act of 1924.
A gentleman`s agreement, defined in the early 20th century as “an agreement between gentlemen working on price controls,” has been described by one source as the loosest form of a “pool.”  It has been pointed out that such agreements can be found in all types of industries and are numerous in the steel and iron industries.  Gentlemen`s agreements were a widespread discriminatory tactic that would have been more common than restrictive alliances to preserve the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements made them extremely difficult to prove or prosecute, and they were so long after the U.S. Supreme Court decisions in Shelley v. Kraemer and Barrows v. Jackson.  One source claims that gentlemen`s agreements “undoubtedly still exist,” but that their use has declined sharply.  A gentlemen`s agreement or gentleman`s agreement is an informal, non-legally binding agreement between two or more parties.
It is usually oral, but it can be written or simply understood as part of a tacit agreement by convention or mutually beneficial label. The essence of a gentlemen`s agreement is that it relies on the honor of the parties for its fulfillment, rather than being enforceable in any way. It is different from a legal agreement or contract. In the automotive industry, Japanese manufacturers agreed that no production car would have more than 276 hp (206 kW; 280 hp); the agreement ended in 2005.  German manufacturers limit the maximum speed of high-performance sedans and station wagons to 250 kilometers per hour (155 mph).    When the Suzuki Hayabusa motorcycle exceeded 310 km/h (190 mph) in 1999, fears of a European ban or crackdown prompted Japanese and European motorcycle manufacturers to agree on an upper limit of 300 km/h (186 mph) at the end of 1999.  See the list of the fastest production motorcycles….