The Fundamental Study on the Methods of investigation, Study, and Conservation of the site at the Mongol Invasion in Takashima Seabed

这项研究的主要工作是在高岛南岸地区进行实地研究。除了这种保存处理的方法，回收的文物在实验室中进行了检查。为了进行对比研究，还对冲绳县石垣市石田路近海海底遗址进行了实地考察，并对回收的陶瓷波进行了绘制和编目。由于高岛的地面地形与海底地形形成了连续的关系，所以从海到陆地进行了观测，并用电视摄像机进行了直观的记录。这是作为实地调查的一部分进行的。同时，在沿固定测量线巡航的同时，连续测量海底剖面，即固定测量线下的深度和地面地层。根据利用侧扫声纳在整个著名地点范围内拍摄的海底地形的地面声纳图像照片的结果，在那些认为考古特征和文物极有可能被掩埋的区域进行了潜水。对这些区域进行了详细的检查和直观的记录。以Urashimoura为中心，被认为是最有可能保留文物的地区，对该地区进行了仔细的调查，并增加了侧扫声纳、海底剖面仪和电磁调查。此外，在观察到阳性反应的3个点进行了钻探，并采集了海底沉积层样本。还采集了子结构数据和测年样品，进行了海底剖面仪数据分析。

The major work undertaken in this study was the conducting of a field study in the zone along the southern shore of Takashima. In addition to this methods of conservation treatment of recovered artifacts wave examined in a laboratory. For purpose of comparative research a field study of the Shitadaru offshore seabed site of Ishigaki City in Okinawa Prefecture was also carried out, with the ceramic waves recovered being drawn and catalogued.As the ground topography of Takashima and the seabed topography form a consecutive relationship, observations were made from the sea to the land, and recorded visually with a TV camera. This was carried out as part of the field survey. Simultaneously a seabed section, namely, the depth and ground stratum under a fixed measuring line were measured continuously while cruising along that line. Based on the results of surface sonar image photographs taken with a side scan sonar of the seabed topography throughout the whole extent of the well known site, dives were made in those areas in which it was thought highly possible that archaeological features and artifacts could be buried. These areas were examined in detail and recorded visually. Centering around Urashimoura, judged as the most likely area in which artifacts could still remain, the area was surveyed carefully, with additional side scan sonar, sub-bottom profiler, and electromagnetic surveys. Furthermore, boring was carried out at 3 of the points at which positive responses were observed, and samples of seabed sediment stratum taken. Substructure data and dating samples were also taken for sub-bottom profiler data analysis.