Environmental Historical Research on Inland Waters in Medieval Japan

本文主要研究中世纪的水陆过渡环境（过渡带）。因此，我发现，氨基佳彦所强调的特权渔业并不是那么普遍，而是各种不同类型的渔业，从小型的简单渔业到技术先进的大型渔业，相互并存，相互竞争。此外，我还澄清了淡水鱼在首都京都是如何被食用和作为礼物交换的，并指出京都渔民捕捞的鲫鱼需求的扩大可能与卡塔塔渔港的发展密切相关。

This study focused on the transitional environment (ecotone) between land and water in the Middle Ages. As a result, I found that fishery with special privileges which Yoshihiko Amino emphasized was not so common, but various different types of fishery, from small-sized simple fishery to large-sized fishery with advanced techniques, coexisted and competed with each other. In addition, I also clarified how freshwater fish was eaten and exchanged as gifts in the capital Kyoto, and pointed out the possibility that expansion of demand for crucian carps caught by Katata fishermen in Kyoto was closely related to the development of Katata fishing port.