Jomon Doki from Toyama Pref.境Ａ遺跡出土品 -富山県埋蔵文化財センター-
As in all other Neolithic cultures, women produced these early potteries. The clay was mixed with a variety of adhesive materials, including mica, lead, fibers, and crushed shells. After the vessel was formed, tools were employed to smooth both the outer and interior surfaces. When completely dry, it was fired in an outdoor bonfire at a temperature of no more than about 900 C.:
Middle Jomon Period
Jar With Sculptural Rim, Japan Jomon period (c. 10,500–300 B.C.)2500–1000 B.C.Low-fired clay.