Answer:
Gentlemen's agreement was signed between the United states of America and Japan in 1907
Explanation:
In 1907, the California Board of Education passsed a discriminatory regulation against children of Japanese origin. It required Japanese children to study in a specific schools allotted to them.
Gentlemen's agreement: So, in 1907, United states of America and Japan proposed this agreement. In that agreement, Japan agreed that it would not issue new passport to Japanese citizens to work in US. USA, exchange agreed to remove the discriminations against Japanese who were already residing there.