The purpose of this paper is to find out the structural changes of hog breeding and the trend of reformation of pork market in Okinawa. According to the above objectives, the variety of functions of Okinawa's systematic agricultural cooperative association (agri-coop association) would be considered. The pork dealers who also held slaughterhouse had led the pork market of Okinawa strongly up to 1980's. Because they controlled all the paths of the market from hog purchase to pork retail. On account of enforcement of appointed slaughterhouse project after Okinawa's reversion to Japan, the dealers lost their position as a powerful role in the market. Moreover, two types of contribution system are forming in the market. One is organized by systematic agri-coop association of Okinawa, the other one is connected by the group of commercial capital. The systematic agri-coop association has started many marketing programs in 1970's to assist individual breeders for selling the hog. But these programs are fixed and enlarged after the agri-coop association merged some slaughterhouses into its own one, and reorganized the slaughterhouse to be a semi-government (daisan) sector. Especially, wholesale market system is not adopted in Okinawa. So, this semi-governmental slaughterhouse is acting as pork dealer in the same time. Besides, the agri-coop association extended its marketing strategies continually such as cooperative feed plant, breeding yards, supermarkets (A-coop), etc. Hence, it can be said that the agri-coop association of Okinawa is promoting integrative management in pork market, and try to oppose the contribution system of commercial capital.