A region of the South Korean peninsula with a well-excavated prehistoric sequence. The first period, Chodo, is not dated but may be contemporary with the Early Jomon of Japan. The Chodo culture is ceramic and classed as Neolithic. The second period, Mokto, has a radiocarbon date of c 3950 BC. The third period, Pusan, is radiocarbon dated to c 3000 BC and was succeeded by the Tudo period characterized by 'comb-pattern' ware. Trade with Japan is documented by imported obsidian and by glycemeris shell bracelets.