Archaeological discoveries show that the Neolithic people settled in the today's Gosan-ri on the western part of Jeju-do approximately 10,000 years ago were skilful users of the bow and arrow for hunting. Archaeological discoveries show that the Neolithic settlers in Gosan-ri on the western part of Jeju-do approximately 10,000 years ago were veteran hunter using of the bow and arrow. It is the evidence that more than 200 arrowheads were excavated in the Gosan-ri Neolithic site. While a majority of the arrowheads were made of stones found in the local area easily, it included some materials that rarely founded in the island such as obsidian and crystal, revealing that the Jeju's Neolithic settlers made an active exchange and barter with other regions.