Kodai, or the foot of the tea bowl commonly forms a complete circle. However in Hagi ware, one section of the Kodai is often cut in a wedge to make it imperfect. The Hagi ware was created and managed by the Feudal lord of Hagi and for official use the Kodai was always in a perfect circle.

Legend said that the potters cut the foot to make the bowls imperfet, so they can keep it and sell to the public. The foots, splitted with one to three or four cuts are called wari-kodai (割高台 - split foot ring), the foots with the cut are called kiri-kodai (切高台 - cut foot ring).