Why is fishery management necessary? What kinds of methods are used? This article will explain the Individual Transferable Quota (ITQ) and Territorial Use Rights for Fishing (TURF) systems, both originating from a field in Economics. In order to effectively carry out joint fisheries management, as seen in Japan's coastal fisheries and elsewhere, I believe it necessary to examine examples of social relations capital, such as local ties and information sharing, themes not previously taken up in discussing fishery management.