Japan was prepared to limit immigration to the United States, but was seriously injured by San Francisco`s discriminatory law, which specifically targeted its people. President Roosevelt, who wanted to maintain good relations with Japan as a pole opposed to Russian expansion in the Far East, intervened. While the U.S. ambassador reassured the Japanese government, Roosevelt summoned the mayor and the San Francisco school board to the White House in February 1907 and convinced him to end segregation and promised that the federal government itself would address the issue of immigration. On February 24, the gentlemen`s agreement was reached with Japan in the form of a Japanese memo, in which it was agreed to deny passports to workers wishing to enter the United States and to recognize the right of the United States to exclude Japanese immigrants with passports initially issued to other countries. March 13, 1907 followed the formal withdrawal of the San Francisco School Board`s decision. A final Japanese note, dated February 18, 1908, made the gentlemen`s agreement fully effective. The agreement was replaced by the Immigration Exclusion Act of 1924. Each party in a gentleman`s agreement has faith that everyone will keep their promise because of their personal sense of honor. The phrase appeared in 1821 in the records of the British Parliament and in the Massachusetts public archives in 1835.  The Oxford English Dictionary cites The 1929 collection of stories by Mr. Mulliner Speaking by P.
G. Wodehouse as the first appearance of the term.  In 2016, the British High Court agreed, after careful consideration of the evidence, that a gentleman`s agreement could be legally binding. Gentlemen`s agreements have come to regulate international activities as the coordination of monetary or trade policies.  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.  In English contract law, for an agreement to be binding, legal relations must be considered; 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.  Etymologists and historians are not sure how the term was born and who used it for the first time. Etymologists study the history and origins of words and phrases, and how they evolved. Sometimes, when the parties know each other very well, it may even be a non-verbal agreement. “A gentleman`s agreement or gentlemen`s agreement is an informal agreement in which people trust themselves to do what they promised.” A gentleman`s agreement, which is rather a point of honour and etiquette, relies on the indulgence of two or more parties for the performance of pronounced or unspoken undertakings.