A study of the social structure in Kofun Period through the research of the group mounded tumuli in Kibi Region

本课题的研究目的是促进吉壁地区群山群的研究。因此，我收集了冈山县丛林群的发掘报告。并利用移动GPS对群栖进行了调查，获取坐标，并将数据放入地理信息系统分析中，制作了赤壁地区群栖的分布图。在本项目期间，我完成了冈山、索贾、仓城、赤和和津山市群栖的地名表。根据这张表，这一地区大约有5000个大腹便便。在此基础上，展望了利用移动GPS获取群丘群坐标的有效方法。

The purpose of this project was that the study of the group mounded tumuli in Kibi region was advanced. Therefore, I collected the excavation reports of the group mounded tumuli in Okayama Prefecture. And I investigated the group mounded tumuli using the mobile GPS to get the coordinates, and the data was put on the analysis of the Geographical Information System to make the distribution map of the group mounded tumuli in Kibi region.In the term of this project, I completed the name of a place table of the group mounded tumuli in Okayama, Soja, Kurashiki, Akaiwa and Tsuyama City. According to this table, there are about 5, 000 tumuli in this area. And then, I obtained the prospect that using mobile GPS was the effective method to get the coordinates of the group mound tumuli.