 This generation, the Nisei, became a distinct cohort from the Issei generation in terms of age, citizenship, and English-language ability, in addition to the usual generational differences.Institutional and interpersonal racism led many of the Nisei to marry other Nisei, resulting in a third distinct generation of Japanese Americans, the Sansei.Significant Japanese immigration did not occur again until the Immigration and Nationality Act of 1965 ended 40 years of bans against immigration from Japan and other countries.