The collection and analysis of map data of the reclamation in the lower basin of Yoshino-gawa river in the ancient Awa-koku province

本研究旨在从历史学、考古学和地理学的角度，揭示吉野川河三角洲的垦殖过程。我们收集并分析了吉野川河流域的旧地图和遗迹和废墟的数据。我们在1997年3月举行的研讨会上介绍了部分研究成果，并于1998年发表了报告。我们在本报告中指出：1)东大寺的两幅地图是8世纪中期新岛不朔庄园的开垦计划，这两幅地图描绘了古代阿和国省的一部分。(2)弥生时代吉野川河下游遗址水田形态与古代土地制度枝田制的地块形态不同。(3)作为江户时代的省图，《阿波国画》的构图夸大了吉野川河的下游。4)江户时代，阿和国省和村庄的部分旧地图采用了17世纪传入日本的荷兰测绘方法。

The aim of this study is to shed light on the processes of the reclamation in delta of Yoshino-gawa river from the viewpoint of history, archaeology and geography. We have collected and analized the old maps and the data of the remains and ruins in the basin of Yoshino-gawa river. We presented a part of this study at the symposium held in March 1997 and published the report in 1998. We pointed out as follows in this report : 1) two maps of Todai-ji temple, which sketched a part of the ancient Awa-koku province, are the plans of reclamation of Niijima-no-sho manor in the middle of the eighth century. 2) the form of paddy fields at the ruins of the lower Yoshino-gawa river during the Yayoi period is not the same as the form of land block of Jori-system, the ancient land system. 3) the composition of the paintings of Awa kuni-ezu, which were the provincial maps in the Edo period, have exaggerated the lower part of Yoshino-gawa river. 4) in the Edo period, some parts of the old maps of Awa-koku province and villages were designed by the survey method of Dutch which was introduced into Japan in the 17th century.