Despite many social injustices, Japanese Americans are one of the most socioeconomically successful ethnic groups in the United States, having the highest median educational level among both Non-white and white groups, a median income exceeding that of white Americans, and greater likelihood of being employed as professionals than are members of the society as a whole. Given each succeeding generation's increasing rate of assimilation into U.S. society, with its concomitant impact upon ethnic ties and affiliation, the author asks whether or not a distinct Japanese community can be maintained into the fourth generation. This study, which employs a national sample of three generations of Japanese Americans, is the largest of its kind ever undertaken. The volume systematically analyzes the socioeconomic adaptation of the Japanese to U.S. society and develops a sociohistorical model that explains the unfolding of the assimilation process.