<P> Nisei (二 世, "second generation") is a Japanese language term used in countries in North America and South America to specify the children born in the new country to Japanese - born immigrants (who are called Issei). The Nisei are considered the second generation; and the grandchildren of the Japanese - born immigrants are called Sansei, or third generation . (Ichi, ni, san are Japanese for "one, two, three"; see Japanese numerals .) </P> <P> Although the earliest organized group of Japanese emigrants left Japan centuries ago, and a later group settled in Mexico in 1897, the four largest populations of Japanese immigrants and their descendants live in Brazil, Canada, Peru, and the United States . </P>

Who are the nisei and what happened to them