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. In English contract law, for it to be binding, an agreement must have the intention of establishing legal relations; but in commercial transactions (i.e. agreements that do not exist between family members or friends), there is a legal presumption of “intent to establish legal relations”. In the 1925 case of Rose and Frank Co. v. JR Crompton – Bros Ltd., however, the House of Lords found that the phrase ” “This regulation is not … a formal or legal agreement … is only a record of the parties` intention “was sufficient to rebut this presumption.  Gentlemen`s agreements have come to regulate international activities such as the coordination of monetary or trade policy.
 According to Edmund Osmasczyk in the United Nations Encyclopedia and International Agreements, it is also defined as “an international term for an oral and unwritten but fully valid agreement.”  This type of agreement may allow a nation to circumvent national legal requirements to enter into a formal contract or it may be useful for a government to want to enter into a secret agreement that does not engage the next government.  According to another author, all international agreements are gentlemen`s agreements because, just before the war, they are all unenforceable.  Osmaczyk noted that there was a difference between gentlemen`s open agreements and secret diplomatic agreements.  In the United States, in 1890, the prohibition of gentlemen`s agreements was introduced in interstate trade relations because the secrecy of these agreements was beyond anyone`s control.  Een herenakkoord (Engels: Gentlemen`s agreement of gentle agreement) is een overeenkomst gesloten tussen twee of meer partijen. Deze kan zowel mondeling als schriftelijk zijn. In beginsel is een herenakkoord niet rechtens afdwingbaar, maar beroept het op de eer van de partijen. Als sanctie op niet nakoming werden maatschappelijk social middelen gekozen als uitstoting. Here tegenover staat een rechtsafdwingbare overeenkomst.
Gentlemen`s agreements were a widespread discriminatory tactic, which would have been more common than restrictive alliances to maintain the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements made it extremely difficult to prove or follow them, and they were long after the U.S. Supreme Court decisions in Shelley/. Kraemer and Barrows v. Jackson.  A source indicates that the gentlemen`s agreements are “probably still in place” but that their use has declined sharply.  An intense anti-Japanese atmosphere developed on the west coast. 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.