A group of Upper Palaeolithic sites on the terraces of the Yubetsu River in the Hokkaido region of Japan. Excavations in the 1950s and 1960s revealed two main groups of material. The oldest dates to between 18 000 and 13 000 years ago and includes large blades, burins, scrapers, and some bifacial points made on obsidian. The younger group dating to the period 13 000 through to 10 000 years ago has more bifacial points and microblades, the latter made in a distinctive technique, known as the Yubetsu technique, in which a large biface is made into a core in the form of a long carinated scraper.
Palaeolithic site beside the Yubetsu River with over 4 million artefacts.
T. Naganuma et al., 1999, Excavation report on the Shirataki site group in Shirataki Village, Manbetsu District. Journal of the Japanese Archaeological Association, 8, 101–16