structural:scholar_edition, stylistic:style_transfer, quality:corruption
Paleolithic period

Hunter-gatherers arrived in Japan in Paleolithic times, with the oldest evidence dating back to around 38–40,000 years ago. Little evidence of their presence remains, as Japan's acidic soils tend to degrade bone remains. However, the discovery of unique edge-ground axes in Japan dated to over 30,000 years ago may be evidence of the first Homo sapiens in Japan. Early humans likely arrived in Japan by sea on watercraft. Evidence of human habitation has been dated to 32,000 years ago in Okinawa's Yamashita Cave and up to 20,000 years ago on Ishigaki Island's Shiraho Saonetabaru Cave. Evidence has been found suggesting that Japan's Paleolithic inhabitants interacted with and butchered now extinct megafauna, including the elephant Palaeoloxodon naumanni, and the giant deer Sinomegaceros yabei.