Comparison study of microblade assemblages of eastern and northern part in Hokkaido

对微片石组分进行比较研究是极为重要的材料，但仍有一些缺陷未见报道。执行那些基本的整理工作、描述工作、制作图形的工作，并报告结果是我们的首要目的。在3年的研究期间，我们也结束了北海道Bihoro-cho Motomachi 2遗址159,893块的位置数据和分类数据的计算机输入。因此，我们能够了解39个元素的富集部分和每个元素的组成。随后，提取了解释它们所必需的1200件石器，并同时完成了制作图形、描述工作和制作石器集中部分分布图的工作。我们的第二个目的是对微刀片的使用和剥落方法进行推定和鉴定。关于微刀片剥落方法的鉴定用组长设计的油压法剥落机进行了反复试验。结果，在这些种群中存在的三种类型的微叶片技术中，成功地再现了大约两种类型的剥落，并通过数值捕获了加压力。目前正在继续复制剩下的一种技术类型。此外，关于使用微刀片的假设，在26000片或更多的显微镜下观察正在继续。这些碎片的长度、宽度和厚度的测量已经结束了98%，这些显微镜的观察结果和统一的整体检查计划在未来进行。

There are rithics Not Reported though it is extremely important material for doing the comparison study of the microblad stone component. Executing those basic arrangement work, description work, and work of making to figure, and reporting on the result are our first purposes.In the study period of 3 years, we also ended the computer input of positional data and the classifying data of 159, 893 pieces of Motomachi 2 site of Bihoro-cho in Hokkaido. As a result, we were able to understand the rithic concentration parts and each rithic composition of 39. Afterwards, stone tools of 1200 pieces necessary to explain them was extracted and work of making to figure, the description work, and making the distribution chart of the rithic concentration part were completed at the same time, too.The-execution of the presumption of the use and of the identification of the method of flaking off the microblade is our second purpose.About the identification of the method of flaking off the microblade ; it made repeated experiments with the machine of flaking off by the oil pressure method that the head investigator had designed. As a result, it succeeded in being able the reproduction of flaking off about two types among the microblade technologies of three types that existed in these rithic groups, and catching the pressurizing power by the numerical value. The reproduction of the remaining one technological type is being continued now.Moreover, about the presumption of the use of the microblade, the observation with the microscope in 26000 pieces or more is being continued. The measurement of length, width, and the thickness of these pieces have already ended 98%, and these observation result of the microscope and a unified overall examination are scheduled to be done in the future.