The purpose of this study is to examine that the instance management in HanShinPlusCare which is conduct agency for social service work through Corporate marketing strategy process(3C analysis→SWOT analysis→STP strategy→marketing mix). It investigated the marketing case in social service field by point of strategy management in business enterprise, attempt to inquire detailed possibility of complex in market by their experience. Pulled data analysis showed that HanShinPlusCare has the following characteristics. First, They lead on making new market through niche strategy that is based on expertise. Second, They adopted into target market very early through execute aggressive marketing. Also minimize competencies distributed through used to concentrated marketing instead of diffetentiated marketing. Third, realize organization’s mission that is company with local community. Conspicuously point that professional workers to actively participate in community activities for making professional group, it showed great result that altered promotion that was high-cost and low-efficiency. Forth, constrain strategy that focus on mutualism instead of competition is noticeable. Although hospitals and other companies were around them, but they actively consider linking-method for making new market, searching for mutual partnership. Thus, HanShinPlusCare doesn’t deploy on variety promotion, nevertheless they working faithfully for social enterprise, affirms its position in community. This case only guaranteed sustainability among conduct agencies for social service, because it has advance strategy that predict social service trend. This result showed implication for social enterprise that will experience similar process.