The first Asian-Argentines were of Japanese descent, arriving in the 1900s. For most of the 20th century they were the only Asians in Argentina. Japanese immigrants were primarily from the island of Okinawa; the majority of dry cleaning establishments in Buenos Aires were, by the mid-20th century, Japanese businesses. During the 1970s the main Asian influx was from South Korea, and during the 1990s from Taiwan and Laos. Unlike most immigrants who arrived earlier in the century, they tended to remain in close social circles and not mix with other local ethnicities. This excluded the Japanese who were the first to arrive and therefore the first to produce a native generation of mixed race Japanese-Argentines, thus integrating more so than the other Asian groups.