Most East Asian immigration in Buenos Aires comes from China. Chinese immigration is the fourth largest in Argentina, with the vast majority of them living in Buenos Aires and its metropolitan area. In the 1980s, most of them were from Taiwan, but since the 1990s the majority of Chinese immigrants come from the Mainland Chinese province of Fukien (Fujian). The mainland Chinese who came from Fukien mainly installed supermarkets throughout the city and the suburbs; these supermarkets are so common that, in average, there is one every two and a half blocks and are simply referred to as ''el chino'' ("the Chinese"). Japanese immigrants are mostly from the Okinawa Prefecture. They started the dry cleaning business in Argentina, an activity that is considered idiosyncratic to the Japanese immigrants in Buenos Aires. Korean Immigration occurred after the division of Korea; they mainly settled in Flores and Once.