 Haji ware came to an end with the development of glazes and ceramics in the late Heian period.During a 2007 underwater archaeology survey on Ojikajima by the Asian Research Institute of Underwater Archaeology, examples of Chinese ceramics and Haji ware were recovered.Haji ware is typically a rust-red pottery, made of clay that was built up in rings or coils, rather than being thrown on a potters wheel.