The is the period of human inhabitation in Japan predating the development of pottery, generally before 10,000 BC. The starting dates commonly given to this period are from around 40,000 BC; although any date of human presence before 35,000 BC is controversial, with artifacts supporting a pre-35,000 BC human presence on the archipelago being of questionable authenticity. The period extended to the beginning of the Mesolithic Jōmon period, or around 14,000 BC. The earliest human bones were discovered in the city of Hamamatsu in Shizuoka Prefecture, which were determined by radiocarbon dating to date to around 18,000–14,000 years ago. Archaeology of the Paleolithic period The study of the Paleolithic period in Japan did not begin until quite recently: the first Paleolithic site was not discovered until 1946, right after the end of World War II. Due to the previous assumption that humans did not live in Japan before the Jōmon period, excavations usually stopped at the beginning of the Jōmon stratum (14,000 BC), and were not carried on further. However, since that first Paleolithic find by Tadahiro Aizawa, around 5,000 Paleolithic sites have been discovered, some of them at existing Jōmon archaeological sites, and some dating to the Pleistocene era. Sites have been discovered from southern Kyushu to northern Hokkaido, but most are small and only stone tools have been preserved due to the high acidity of the Japanese soil. As the Paleolithic peoples probably occupied the wide coastal shelves exposed by lower sea levels during the Pleistocene, the majority of sites are most likely inundated. The study of the Japanese Paleolithic period is characterized by a high level of stratigraphic information due to the volcanic nature of the archipelago: large eruptions tend to cover the islands with levels of Volcanic ash, which are easily datable and can be found throughout the country as a reference. A very important such layer is the AT (Aira-Tanzawa) pumice, which covered all Japan around 21,000–22,000 years ago. Paleolithic hoax In 2000, the reputation of Japanese archaeology of the Paleolithic was heavily damaged by a scandal, which has become known as the Japanese Paleolithic hoax. The Mainichi Shimbun reported the photos in which Shinichi Fujimura, an archaeologist in Miyagi Prefecture, had been planting artifacts at the Kamitakamori site, where he "found" the artifacts the next day. He admitted the fabrication in an interview with the newspaper. The Japanese Archaeological Association disaffiliated Fujimura from its