What prompted you to look for a gentleman`s agreement? Please let us know where you read or heard it (including the quote, if possible). For an agreement to be binding in English contract law, one must intend to create legal relationships; but in trade (i.e. agreements that are not concluded between family members or friends), there is a legal presumption of „willingness to create legal relationships“. In the 1925 case of Rose & Frank Co v. JR Crompton & Bros Ltd, however, the House of Lords found that the phrase „This agreement is not. a formal or legal agreement. however, only a record of the intention of the parties“ was sufficient to rebut the presumption in question.  „Gentleman`s Agreement“. Merriam-Webster.com dictionary, merriam weaver, www.merriam-webster.com/dictionary/gentleman%27s%20agreement. Retrieved November 27, 2020. Gentlemen`s agreements were a widespread discriminatory tactic that, according to reports, was more common than restrictive alliances to maintain the homogeneity of upper-class neighborhoods and suburbs in the United States.  The nature of these agreements has made it extremely difficult to prove or prosecute them and have been long after the U.S. Supreme Court`s decisions in Shelley v.
Kraemer and Barrows v. Jackson.  One source indicates that gentlemen`s agreements „undoubtedly exist,“ 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 upset Japan by legislating to ban Japanese immigration to the United States, as happened with Chinese immigration. Instead, there was an informal „gentlemen`s agreement“ (1907-8) between the United States and Japan, with Japan ensuring that there was very little or no movement toward the United States. The agreements were reached by US Secretary of State Elihu Root and Japanese Foreign Minister Tadasu Hayashi. The agreement prohibited the emigration of Japanese workers to the United States and annulled the segregation order of the San Francisco School Board in California, which had humiliated and upset the Japanese.
The agreement did not apply to the territory of Hawaii, which was then treated separately and separately from the United States. The agreements remained in effect until 1924, when Congress banned all immigration from Japan.  A similar anti-Japanese atmosphere in Canada also led to the Hayashi Lemieux Agreement, also known as the „gentlemen`s agreement of 1908,“ with substantially similar clauses and effects.