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Pirika Site: Assembled Rankoshi-type microblade core
A distribution survey was conducted to clarify the spread of the Pirika Site in 1987 and 1988. Excavation using 600 one square-meter trial pits established at regular intervals revealed that the site extends over approximately 200,000 m2 on the hill. This area is equivalent to about four baseball stadiums.
photo courtesy: Photographed by Tadahiro Ogawa