A gentlemen`s agreement, or gentleman`s agreement, is an informal and legally non-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 by mutually beneficial label. The essence of a gentlemen`s agreement is that it depends on the honour of the parties for its achievement, rather than being enforceable in one way or another. It differs from a legal agreement or a contract. On the west coast, an intense anti-Japanese atmosphere developed. U.S. President Theodore Roosevelt did not want to anger Japan by passing laws banning Japanese immigration to the United States, as had happened with Chinese immigration. Instead, there was an informal “gentlemen`s agreement” (1907-1908) between the United States and Japan, in which Japan ensured that there was little or no movement in the United States. The agreements were concluded by U.S. Secretary of State Elihu Root and Japanese Secretary of State Tadasu Hayashi. The agreement banned the emigration of Japanese workers to the United States and repealed the order of segregation of the San Francisco School Board in California, which had humiliated and angered the Japanese. The agreement did not apply to the territory of Hawaii, which was then treated as separate and separate from the United States. The agreements remained in effect until 1924, when Congress banned all immigration from Japan.
 Similar anti-Japanese sentiments in Canada led simultaneously to Hayashi Lemieux`s agreement, also known as the Gentlemen`s Agreement of 1908, with substantially similar clauses and effects.  In a report by the U.S. House of Representatives detailing its investigation into the United States Steel Corporation, it was stated that in the 1890s there were two general types of bulk associations or consolidations between steel and ferrous interests in which the various groups held ownership, as well as a high degree of independence: the “pool” and the “gentleman`s agreement.”  The latter type lacked a formal organisation to regulate production or prices or forfeiture rules in the event of infringement.  The effectiveness of the agreement relied on members to meet informal commitments.  A gentleman`s agreement, defined in the early 20th century as “an agreement between gentlemen who looks at price control,” was described by one source as the loosest form of a “pool.”  Such agreements have been declared in all industrial sectors and are numerous in the steel and steel industry.  Until Jackie Robinson was hired by the Brooklyn Dodgers in 1946, a gentlemen`s agreement ensured that African-American players were excluded from organized baseball.  In the automotive industry, Japanese manufacturers have agreed that no standard vehicle 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 (berlines) and breaks to 250 km/h.   When the Suzuki Hayabusa motorcycle exceeded 310 km/h in 1999, fears of a European ban or regulatory intervention led Japanese and European manufacturers to limit to 300 km/h at the end of 1999 See list of the fastest series bikes.