Kamuiyaki ware

The Mottaimatsu Site, which was at its peak from the middle 12th century to the first half of the 13th century, had a huge variety of goods including kamuiyaki, a large number of Chinese ceramics such as Longquan celadon and Tong'an celadon, and in smaller quantity, sue wares from eastern Harima Province and Tokoname-yaki from Owari Province.

Archaeologist Miyashita Takahiro argued that the Manose River basin had served as a trade center connected to Hakata–Dazaifu of northern Kyūshū.

The presence of kamuiyaki suggests that this region was involved in the trade with the Southern Islands although excavated wares were slightly newer (around the 13th century) than archaeologists expected them to be.

[3] In the Amami Islands, in which the kiln sites are located, the emergence of kamuiyaki led to the disappearance of native Kaneku-type earthenwares in the first half of the 11th century.

[5] Kamuiyaki found in the Okinawa Islands are characterized by their association with white glazed wares, soapstone cauldrons and locally produced earthenwares.

[4] Ikeda Yoshifumi raised doubts and suspected that flat bottomed pottery and gusuku wares had co-existed in the 11th to 12th centuries.

In his hypothesis, gusuku wares represented an external power that took time to assimilate indigenous societies that produced flat bottomed pottery.

It means that these southern island groups were finally integrated into a large culture (in an archaeological sense) of northern origin.

However, Shinzato Akito argues that judging from typological differences in wares and kilns, kamuiyaki were not directly influenced by Sagariyama.

Massive amounts of Turbo shells were excavated from archaeological sites of the Amami Islands, dating from the 7th century onwards.

[2] Asato Susumu claimed that the one who had distributed kamuiyaki and soapstone cauldrons from Amami to Yaeyama was "Ryūkyū's merchants" (琉球の商人).

Takanashi hypothesized that the primary purpose of kamuiyaki production in Tokunoshima had been to supply a demand for commodities at the Gusuku Site Complex of Kikai Island, a supposed outpost of the State of Japan.