Until recently, several hypotheses on the origin(s) and dispersion of microblade technology in Northeast Asia have been presented and discussed. Although various definitions of microblade and bladelet have been proposed in diverse geographic and chronological contexts, several researchers may agree that the pressure knapping technique for microblade production plays a paramount role in the process of significant changes in lithic technology and human behaviours between marine isotope stages (MIS) 3 and 2. One of the main topics in the study of microblade technology in Northeast Asia is establishing a systematic and reliable method for identifying microblade knapping techniques that are quantitatively verified. This paper attempts to present a more improved method for identifying microblade knapping techniques by dealing with the analysis of fracture wings which are the reliable indicators of the crack velocity. The focus of this paper is on identifying obsidian microblade-like debitage knapping techniques in the Last Glacial Maximum (LGM) assemblage of Kawanishi-C in Hokkaido, Northern Japan. The results of fracture wing analysis show that the microblade-like longitudinal debitage production at the Kashiwadai-C site was employed by not pressure but percussion techniques. This gives new insights into the diversity of microblade and microblae-like debitage reduction sequences in the LGM Hokkaido and complex process of significant changes in lithic technology, especially in relation to the emergence of microblade technology. In addition, this study shows that the analysis of fracture wings can allow appropriate technological evaluation of the microblades and microblade-like longitudinal debitage production in the period before and around the LGM in Northeast Asia.

直到最近，已经提出和讨论了关于微刀片技术在东北亚的起源和扩散的几个假设。尽管在不同的地理和年代背景下已经提出了微刀片和小叶片的各种定义，但一些研究人员可能同意，微刀片生产的压力敲击技术在海洋同位素阶段之间岩石技术和人类行为的显着变化过程中起着至关重要的作用。 MIS) 3 和 2. 东北亚微刀片技术研究的主要课题之一是建立一种系统可靠的方法来识别经过定量验证的微刀片敲击技术。本文试图通过处理裂纹速度的可靠指标断裂翼的分析，提出一种更改进的方法来识别微叶片敲击技术。本文的重点是在日本北部北海道 Kawanishi-C 的末次盛冰期 (LGM) 组合中识别类似黑曜石微刀片的扣押技术。断裂翼分析结果表明，柏台-C 位点的微刀片状纵向钻削生产不是采用压力而是采用冲击技术。这为了解 LGM 北海道中微刀片和类似微刀片的债务减少序列的多样性以及石器技术显着变化的复杂过程提供了新的见解，特别是与微刀片技术的出现有关。此外，