- 著者
- 三辻 利一 小野 裕子 天野 哲也
- 出版者
- 北海道大学総合博物館
- 雑誌
- 北海道大学総合博物館研究報告 (ISSN:1348169X)
- 巻号頁・発行日
- vol.4, pp.139-152, 2008-03-31
The pottery from the Kafukai 1 site on Rebun Island is a grey semi-hard ceramic which was manufactured on turn wheel and fired in a closed kiln at high temperatures. Based on typological analyses, two assumptions have been presented for the origin of the pottery: Sue pottery manufactured in Japan, and ceramic-like pottery made in the far eastern area of the Eurasian continent. In order to confirm these possibilities, the analytical data of the Kafukai-1 pottery were compared to both the Sue and ancient Pohai ceramics. The pottery from Kafukai-1 and the Pohai ceramics had high contents of K and Rb. Although the analytical data were not identical to those of the Pohai ceramics, they were found to be analogous. This, therefore, proves that the pottery could be a Pohai product. At the same time, the possibility of the Kafukai pottery being ancient Japanese Sue-ware was also surveyed. Generally the contents of Ca and Sr in hard ceramics are lower than in Haji ceramics, because in high temperatures above 1000oC, high contents of Ca obstruct the baking of hard ceramics. The date of the Kafukai pottery is inferred to be between the 6th and 7th centuries, and most of the Sue-ware kiln sites in the 6th and 7th centuries were concentrated in the Kinki and Toukai districts. Since the contents of the Kafukai pottery did not correspond to those from the Sue kilnsites, the date of the corresponding kiln was extended to the 9th and 10th centuries. The Mannendani kiln site located in Toyama Prefecture and the Ebisawa kiln site in Akita Prefecture along the Sea of Japan were selected as the corresponding kilns. Discriminatory analyses were carried out between the Mannendani and the Ebisawa kiln sites using the indices of K, Ca, Rb and Sr. Although the Kafukai pottery did not belong to either of these mother groups, the results were analogous to the Mannendani Sue-ware. Whether the pottery is a Mannendani product still remains to be proven. Further analyses of Sue materials produced in the middle and northern areas along the coast of the Sea of Japan indicated that these coastal regions were the most possible areas.