Ground Stone and Polished Tools
The Japanese Paleolithic is also unique in that it incorporates the earliest known ground stone tools and polished stone tools in the world, dated to around 30,000 BC, a technology typically associated with the beginning of the Neolithic, around 10,000 BC, in the rest of the world. It is not known why such tools were created so early in Japan, although the period is associated with a warmer climate worldwide (30,000–20,000 before present), and the islands may have particularly benefited from it.
Because of this originality, the Japanese Paleolithic period in Japan does not exactly match the traditional definition of Paleolithic based on stone technology (chipped stone tools). Japanese Paleolithic tool implements thus display Mesolithic and Neolithic traits as early as 30,000 BC.
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