A possible new oldest pottery group in the Southern Ryukyu Islands, Japan: Comparative analysis of elemental components of potsherds from the Shiraho-Saonetabaru Cave Site

Yamagiwa, Kaishi; Fujimoto, Shingo; Aoyama, Hiroaki; Izumi, Jin; Kameshima, Shingo

doi:10.1016/j.jasrep.2019.101879

Cited by 6 publications

(7 citation statements)

References 13 publications

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“…9). Recent archaeological evidence shows little cultural influence from ancestral Austronesians to the Ryukyu islands (i.e., southernmost islands in the Japanese archipelago) in the last 10,000 years 51 . Given this cultural continuity, it is unlikely that this extra genetic affinity to IK002 was formed due to recent gene flow as shown in a previous study 52 (see Supplementary Discussion).…”

Section: Discussionmentioning

confidence: 99%

Ancient Jomon genome sequence analysis sheds light on migration patterns of early East Asian populations

et al. 2020

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Anatomically modern humans reached East Asia more than 40,000 years ago. However, key questions still remain unanswered with regard to the route(s) and the number of wave(s) in the dispersal into East Eurasia. Ancient genomes at the edge of the region may elucidate a more detailed picture of the peopling of East Eurasia. Here, we analyze the whole-genome sequence of a 2,500-year-old individual (IK002) from the main-island of Japan that is characterized with a typical Jomon culture. The phylogenetic analyses support multiple waves of migration, with IK002 forming a basal lineage to the East and Northeast Asian genomes examined, likely representing some of the earliest-wave migrants who went north from Southeast Asia to East Asia. Furthermore, IK002 shows strong genetic affinity with the indigenous Taiwan aborigines, which may support a coastal route of the Jomon-ancestry migration. This study highlights the power of ancient genomics to provide new insights into the complex history of human migration into East Eurasia.

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Section: Discussionmentioning

confidence: 99%

Ancient Jomon genome sequence analysis sheds light on migration patterns of early East Asian populations

et al. 2020

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“…The analysis in this study improved on our previous study [23,24]. An XGT-7200 XRF microscope (Horiba, Japan) was used to analyze the chemical components of the roof tiles, enabling measurement of the elemental distribution on the tile surfaces using spectral analysis.…”

Section: X-ray Fluorescence Microscopic Analysismentioning

confidence: 86%

“…The average values were calculated based on the Dirichlet distribution using 231 measuring points, as described in our previous study [ 24 ]. A principal component analysis (PCA) was performed using the prcomp function of the stat package in R. Linear discriminant analysis effect size (LEfSe) was performed using the tool within the Galaxy web application [ 25 ].…”

Section: Methodsmentioning

confidence: 99%

A new perspective on the evolution of “Kawara” roof tiles in Ryukyu: A multidisciplinary non-destructive analysis of roof tile transition at Shuri Castle, Ryukyu Islands, Japan

Aoyama

Yamagiwa²,

Taira³

et al. 2022

PLoS ONE

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A unique historical architecture was created at Shuri Castle (Shuri-jo) in the Ryukyu Islands by its “Kawara” roof tiles. After the 13th and 14th centuries, Kawara tiles were introduced to the Ryukyu Islands from several regions, including China, Korea, and mainland Japan, and evolved shapes and patterns that are unique to this island region. However, the transition of some internal features, such as the chemical components and microstructure, had not been analyzed. This study used a multi-faceted approach for such internal data and non-destructive quantitative methods to propose a new perspective on the evolution of historical Ryukyuan Kawara. We analyzed two styles of Ryukyuan Kawara from the 13th to 15th centuries and found that the material processing and firing conditions of the two styles were very similar, even though it had been suggested that they had different origins. A quantitative analysis of tiles from the 16th to 19th centuries revealed a transition in color tone to red, leading to the modern traditional Ryukyuan tiles; traces of changes in firing conditions were also found along with this transition. Finally, the study revealed that the evolution of Ryukyuan Kawara consisted of changed factors, e.g. surface color, and unchanged factors, e.g. paste density. Previous archaeological studies mainly focused on changing external characteristics, such as form and pattern; however, our analysis showed that the internal features changed, while the elemental composition and paste density remained constant from the appearance of the roof tiles until the 19th century. We propose that this is related to different responses of individual factors to external stressors, such as the social context, which may be common to other archaeological artifacts as well. Our study provides a new perspective on the evolution of Ryukyuan Kawara and presents a different discussion of and methods for the chronological study of material culture.

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“…Recent discoveries suggest probable continuous hunter-gatherer settlement of the Amami and Okinawa archipelagos since at least 7000 years ago (Takamiya, 2021;Takamiya et al, 2019). A similar antiquity may exist for the Yaeyama archipelago (Yamagiwa et al, 2019) (Fig. 1).…”

Section: Introductionmentioning

confidence: 92%

Demography, trade and state power: a tripartite model of medieval farming/language dispersals in the Ryukyu Islands

et al. 2022

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Hunter-gatherer occupations of small islands are rare in world prehistory and it is widely accepted that island settlement is facilitated by agriculture. The Ryukyu Islands contradict that understanding on two counts: not only did they have a long history of hunter-gatherer settlement, they also have a very late date for the onset of agriculture, which only reached the archipelago between the 8th and 13th centuries AD. Here, we combine archaeology and linguistics to propose a tripartite model for the spread of agriculture and Ryukyuan languages to the Ryukyu Islands. Employing demographic growth, trade/piracy and the political influence of neighbouring states, this model provides a synthetic yet flexible understanding of farming/language dispersals in the Ryukyus within the complex historical background of medieval East Asia.

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A possible new oldest pottery group in the Southern Ryukyu Islands, Japan: Comparative analysis of elemental components of potsherds from the Shiraho-Saonetabaru Cave Site

Cited by 6 publications

References 13 publications

Ancient Jomon genome sequence analysis sheds light on migration patterns of early East Asian populations

Ancient Jomon genome sequence analysis sheds light on migration patterns of early East Asian populations

A new perspective on the evolution of “Kawara” roof tiles in Ryukyu: A multidisciplinary non-destructive analysis of roof tile transition at Shuri Castle, Ryukyu Islands, Japan

Demography, trade and state power: a tripartite model of medieval farming/language dispersals in the Ryukyu Islands

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