Study on the condition of reproduction on household management and marketing in the oyster aquaculture industry in Japan

近年来，大规模的家庭企业雇用其他国家的工人，增加他们的木筏数量，并逐步扩大规模。另一方面，小规模的家庭企业没有水平或想法雇用其他国家的工人。换句话说，我们发现牡蛎养殖业正在两极分化。大家庭正试图获得新的商业机会。此外，我们可以看到，牡蛎养殖户经营的扩大和缩小，劳动力的重组，以及与外部经济的联系逐渐变得清晰。

Recently, the large-scale household businesses are employing other country's workers, increasing their number of rafts, and gradually growing larger in scale. On the other hand, the small-scale household businesses do not have the level or the thinking to employ other country's workers. In other words, we find that polarization of the oyster aquaculture industry is underway. the large-scale households are trying to acquire new business opportunities. Furthermore, we can see it gradually became clear that the expansion and reduction of oyster aquaculture household management, reorganization of labor, and connection with external economies.