A Study of the Formation Process of Agrarian Society in the Ryukyu Island Chain During the General Period of the 5th to 7th Centuries

1.以澄清奄美地区和冲绳地区之间的差异。通过考古和自然科学技术在遗迹调查中的结合，尽可能有效地描述这些地区的古代人类文化。为了证明绿蜗牛在7 ~ 8世纪在这些地区进行交易的假设。以下是本研究的结果（1)~(7)）：(1)。在江家岛的长垣原东贝壳丘的3个遗址和奄美大岛的荒口和松野遗骸的挖掘工作已经完成。这些遗址位于琉球群岛的海岸沙丘上。人们所观察到的人类生活的痕迹被认为可以追溯到公元前2世纪至公元前10世纪。分析了冲绳和天美地区6 ~ 8世纪的文化层中收集的植物、动物和贝壳残骸。这一分析证明了这两个地区在生存方式上的差异。更多的差异与特定的环境因素有关。(3)。出土的两具遗骸均含有由根形成的孔隙系统。（4).利用地理和沉积学分析对奄美大岛两处遗址的自然环境进行了调查。这次调查揭示了遗址与珊瑚礁形成的过程是相互关联的。(5)。在奄美大岛和冲绳岛上发现的陶器器皿的历史可以追溯到公元前5世纪到公元8世纪。(6)。发现的证据表明，在公元7世纪和8世纪期间，人们有意大量收集绿蜗牛。在奄美大岛的三个废墟上，这一事实得到了证实。绿蜗牛很有可能在这段时间被用于贸易。（7).通过结合沉积学和考古学的调查，研究人员能够对迄今未被观察到的文化层有一些了解。仔细观察白沙（壤土）层，发现了文化层的痕迹。到目前为止，研究人员还无法确定在壤土层中是否确实存在文化层。少

1.to clarify any differences between the Amami region and the Okinawa region2.to describe ancient human cultures in these areas as effectively as possible through a combination of archaeological and natural science techniques used in the investigation of ruins3.to prove the hypothesis that Green-snails were traded in these areas during the 7^<th> to 8^<th> centuriesThe following are the results of this research ((1)〜(7)) :(1).Excavation was completed on the three ruins of Nagarabaru East Shell Mound at Ie Island, as well as the Aragou and Matsunoto remains at Amami-Oshima Island. These sites are located on the coastal dune of the Ryukyu Islands. Traces of human life observed are believed to date back to the 2^<nd> to 10^<th> centuries B.C. (2).Plant, animal and shell remains collected from cultural layers dating from the 6^<th> to 8^<th> centuries in the Amami and Okinawa regions were analyzed. This analysis proved the difference in the subsistence lifestyle of those two regions. The d … More ifferences were linked to particular environmental factors. (3).The excavation of two remains showed that both contained pore systems formed by roots. (4).The natural environment at two remains on the Amami-Oshima Island was investigated using geographical and sedimentology analyses. This investigation revealed that the, processes involved in the formation of the ruins and the coral reef were related. (5).A timeline was drawn up of the creation of earthenware vessels dating from the 5^<th> to 8^<th> centuries found on Amami-Oshima and Okinawa Islands. (6).Evidence was uncovered to suggest that during the 7^<th and 8^<th> centuries Green-snails were collected intentionally in large quantities. At three ruins on Amami-Oshima, this fact was confirmed. There is a high probability that Green-snails were used for trade during this time. (7).By combining investigations in sedimentology and archaeology, researchers were able to gain some understanding of cultural layers hitherto unobserved. Careful observation of the white sand (loam) layer revealed traces of cultural layers. Up until now, researchers had been unable to determine whether cultural layers were indeed present in the loam layer. Less