The majority of hog breeders started the breeding originally just for their own consumption. However, if the pork market develops, breeders who want to sell hog into the market must have larger scale and stable reproduction project of hog breeding to meet the increasing demand of consumers. So, breeders could choose the road to depend on a Commercial Capital to strengthen constitution of management, or choose the road to hold independence of outside control but solve the problems of management by one's own exertions. In Japan, because Commercial Capital has expanded the integration in hog breeding, small scale breeders are facing heavy problems in breeding management, and perhaps hard to overcome. In order to protect partner breeders from such problems, Agri-Coop began advancing some connected projects on hog breeding toward its partner breeders. We could find out the projects of Agri-Coop by viewing the case of Kagoshima, further, clarify the meaning of the "Agri-Coop's integration".