The city of Setouchi is dotted with the kiln sites of Sueki from the Kofun period to the Heian period, and they are called 'Oku koyoseki-gun' (Oku old kiln site group), which was the largest place of production of Sueki in the Chugoku and Shikoku region.
瀬戸内市内には古墳時代から平安時代にかけての須恵器窯跡が点在し、「邑久古窯跡群」と呼ばれており、中四国地方最大の須恵器生産地であった。