The earliest type of Korean pottery is known as “Gosan-ri type pottery,” having been discovered at the site of Gosan-ri on Jeju Island. Gosan-ri type pottery is characterized by its brown color, undecorated surface, and gaps in the base clay where plant fibers or animal hairs burnt away during the firing process. Notably, this pottery was discovered along with bifacial stone arrowheads produced with pressure flaking, which are associated with the Late Paleolithic period. Thus, Gosan-ri type pottery is believed to demonstrate the transition from the Paleolithic to the Neolithic period. The site of Gosan-ri is approximately 10,000 years old, providing evidence that the Korean Neolithic period began even earlier than previously thought.