East Asian societies are experiencing a rapid social transformation due to population shrinking, aging, fertility decline, gender imbalance, and the concomitant inflow of foreign nationals through labor migration and interethnic marriages. The influx of migration sets to accelerate social change by bringing different cultures to more homogeneous mono-ethnic societies such as Japan, South Korea (hereafter Korea), and Taiwan.1 With the shrinking of the economically active population due to a rapid decline of fertility and an aging population, the governments have to address the problem of subsequent domestic labor shortages with the inflow of labor migration to fill the gap between the demand and supply of labor. In addition to the domestic need for labor, migration could naturally occur across Asian borders due to a widening difference in income between the countries.2 It is obvious that labor migration across boarders can be attributed to the combined factors of income disparity and population dynamics...
