These potteries excavated at a shell mound site in Gwakji-ri, Aewol-eup of jeju are the representative remains of the early Tamna period. These potteries feature that have reddish brown color and have outflaring mouth shape.
The pottery was made by firing in oxidizing atmosphere without using the device such as the turntable of a potter's wheel, hence exhibiting untrimmed surfaces. The potteries exhibit a variety of forms, but a great majority are jars. The shape of the jars is similar to that of the storage jars that appeared on the southwestern part of korean peninsula between the 2nd and 3rd century. However, the shaping and firing techniques reveal the difference of the two.