Mukibanda Ruins located in Yodoe-cho, Yonago City, Tottori Prefecture are the remains from Yayoi period (BC 3rd to AD 3rd centuries). It is one of the largest ruins of the Yayoi colony excavated in Japan. Over 400 pit dwellings, over 500 buildings with supporting pillars, and 34 graves, which were supposedly built from the end of the mid-Yayoi period to Kofun period ((3rd-6th centuries), have been excavated. The colony was composed of seven sections, each of which had different role and function. This large-scale colony is supposed to have been the provincial center of the period. It is supposed that the colony was constructed in a highland due to the political turbulences occurring during this period. However as it is very exceptional that such a large-scale colony existed for such a long period of time, the ruins attract attention of many researchers.