Landscape comparison from the Jomon period to the Yayoi period and sample of excavated botanical remains

本报告旨在比较冈山平原绳纹时代和弥生时代的景观，并提供资料收集，包括挖掘种子的样本和冈山县、三仁和国地区有关农业的木制农具和石器的描述。通过对比研究，从复原的过去地理特征和考古特征的分布来看，确认了绳纹晚期与弥生早期的巨大差异。我们认识到聚落区域发生了变化，与职业有关的特征也从贮藏坑变成了湿田。我们认为这意味着与社会结构有关的变化。此外，在弥生时代，我们认识到中期开始和后期开始的重要变化。重要的是，在弥生时代中期的边界上广泛发现了灌溉渠。我们认为，弥生时代早期耕地面积的迅速扩大和耕地土壤的质的变化是农业形态的划时代之举。我们认识到自然环境发展的进步和农业形式的迅速进步是弥生时代社会的过渡。植物蛋白石和花粉分析的结果证明了种植面积和场地的扩大。植物蛋白石分析表明，弥生早期的生产力极低。这证明后来的耕作方式发生了变化。花粉分析阐明了弥生期中期植被的变化。本报告提供了从绳纹时代到弥生时代的职业变化的详细材料语料库和案例研究。

This report aims to compare the landscape from the Jomon period to the Yayoi period in Okayama plains, and to offer a material collection that includes the sample of excavated seeds and the description about wooden agricultural tools and stone tools related to the agriculture in Okayama prefecture, the San' in and the Shikoku region.As a result of the comparison research, we confirm the large difference between the late Jomon period and the early Yayoi period from the viewpoint of the past geographical features that we restored and the distribution of archaeological features. We recognize that the settlement area changed and features which relate to occupation changed from storage pits to wet paddies. We consider that means changes related to the social structure.In addition, in the Yayoi period, we recognize important changes at the beginning of the middle period and at the beginning of the late period. It is important that irrigation canals are widely detected on the boundary of the middle Yayoi period. We evaluate the rapid expansion of cultivation area and cultivation soil that changed qualitatively at the early Yayoi period as the epoch making of agricultural forms. We recognize the progress of the development of the natural environment and the rapid progress in agricultural forms as the Slough to societies of the Yayoi period.The results of the plant opal and pollen analysis prove expansions of cultivation area and sites. The plant opal analysis clarifies the extremely low productivity in the early Yayoi period. This proves the way of farming changed afterwards. The pollen analysis clarifies changes of vegetation in the middle Yayoi period.This report presents the detailed material corpus and a case study concerning occupation changes from the Jomon period to the Yayoi period.