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

最近，大型家庭企业正在雇佣外国工人，增加他们的木筏数量，并逐渐做大规模。另一方面，小规模家庭企业没有雇佣他国工人的水平和思想。换句话说，我们发现牡蛎养殖业的两极分化正在发生。大户型家庭正在努力获得新的商机。此外，我们可以看到，牡蛎养殖的扩大和减少家庭经营，劳动力重组，与外部经济的联系逐渐明显。

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.