Yubetsu technique

The Yubetsu technique (Japanese涌 别 技法, Yubetsu Giho ) is an advance technology for the production of microliths, which has similarities with techniques in Mongolia and was used during the Paleolithic period in Hokkaido and northern Honshu. It was named Yubetsu technique in 1961 by the archaeologist Serizawa and Yoshizaki Chosuke Masakazu they described based on their findings on Hokkaidō. The name derives Yubetsu the river Yubetsu in the community Engaru from the finding place in Shirataki (白 滝 遗迹, Shirataki Iseki ). The stone tools found here were in and below the As- YP- Tephraschicht [note 1] found and so on 13,000 v.H. dated. Man according to the sites are two types of nuclei: the Shirataki (白 滝 型) and the Sakkotsu type (札 滑 型).

The production of microliths by Yubetsu technique is carried out in four to five steps: