Impressions on pottery revealed cultivation of Glycine max subsp. max (soybean) in the late to latest Jomon periods in Kyushu Island

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  • 土器圧痕からみた 縄文時代後・晩期における九州のダイズ栽培
  • ドキ アツコン カラ ミタ ジョウモン ジダイ コウ バンキ ニ オケル キュウシュウ ノ ダイズ サイバイ
  • Impressions on pottery revealed cultivation of Glycine max (soybean) in the latest Jomon periods in Kyushu Island

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Abstract

With the recent progress of a replication technique, we can now observe the details of impressions on pottery and can correctly identify the species that made the impressions. We compared the shape, size, and structure of the “Wakudoishi type” impressions thought to be the hila of leguminous seeds with the hila of extant leguminous seeds. We found that the hila of excavated large beans made the “Wakudoishi type” impressions on the pottery of the late to latest Jomon periods in the Shimabara peninsula and the Kumamoto plain, central Kyushu Island. Further morphological observation showed that the excavated large beans are probably a type of Glycine max subsp. max cultivated in the Jomon period. We deduced from archaeological evidence that the prehistoric Glycine max subsp. max was introduced to Kyushu Island in the middle phase of the late Jomon period (ca. 1600 cal BC) from the Korean peninsula together with rice and barley.

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