The Issei Japanese (一世 lit. first generation) are native Japanese who emigrated from Japan primarily to North America. Their children and grandchildren are known as Nisei Japanese and Sansei Japanese respectively.
See also:Issei Japanese American
Example Usage of Japanese
shiinachan: passed the Japanese test, English translation was ..okay I guess. Finally this week is over!
TND_VideoGames: Professor Layton Tops Japanese Chart (http://cli.gs/2B19P) #videogames
frannygarcia: I can't believe I'm saying this... I want 2 B back @ uni, learning more Japanese. 1.5 years til I head for Japan, 1 if I get a scholarship!