The general research about development in the coastal area in the Medieval Period in Japan

沿海地区的开发，如港口建设工程、填海造地、河岸工程、灌溉工程等，是由各种因素组成的。它们之间的关系错综复杂，导致它们之间的关系不局限于特定的领域。我全面收集了日本从11世纪到16世纪的中世纪时期沿海地区开发的历史记录，并将其整理并制作了一个临时历史记录列表。笔者将沿海地区的开发分为滩涂的形成与利用、海蚀土地的开发、港口建设、疏港、渔场开发等六种模式，并以案例分析为基础，考察了该地区的经济活动和主导地位的实际状况。

Development in the coastal area, such as harbor construction work,land reclamation, riparian work, irrigation, are composed of various constituents. Their complicated relations lead to various relationships not limited specific area. I’ve gathered historical records about development in the coastal area in the Medieval Period, from eleven to sixteen century in Japan comprehensively, organized them and made a temporary historical record list. I’ve classified about development in the coastal area according to six patterns, such as the formation and application of tidal flats, development land damaged from seawater, harbor construction work, dredge harbors, development fishing ground and so on. Based on their case studies, I’ve investigated about the economic activity in the area and the actual state of the dominance.