Research on the relationship between stone procurement, stone tool production, and distribution in the Jomon Period: A Case Study of the relay site in Yamanashi Prefecture.

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K13237
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 03050:Archaeology-related
• Research Institution: Teikyo University
• Principal Investigator: Kanai Takuto 帝京大学, 付置研究所, 助教 (60779081)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 黒曜石 / 水晶 / 原産地推定 / 縄文時代 / 蛍光X線分析 / 赤外分光分析

Outline of Final Research Achievements

This study examines the supply of stone materials in the Yamanashi area during the latter half of the Early Jomon Period (Moroiso period). Obsidian from the Suwa area exhibited the highest weight ratio throughout the entire Moroiso period, indicating that large quantities of obsidian from the Suwa area were supplied to the Kofu Basin even prior to the onset of mining activities (Moroiso c period). Furthermore, obsidian raw materials were supplied to the eastern part of the Kofu Basin and Fujiyoshida, whereas no obsidian raw material was found in Otsuki and western Hachioji. The source of quartz can be divided into the Kinpusan Mountains on the border between Yamanashi and Nagano prefectures and the Enzan area in the eastern Kofu Basin, with the majority of quartz used during the Jomon period clearly originating from the Enzan area.

Free Research Field

文化財科学

Academic Significance and Societal Importance of the Research Achievements

山梨は黒曜石の原産地である信州と消費地である南関東の間に位置するが、これまでの縄文時代の遺物の原産地推定は限定的で、本研究によって山梨地域への黒曜石供給の姿が明らかになった。他地域では諏訪エリアの黒曜石の占有率の変化が採掘開始を境として急増する例が報告されているが、山梨では採掘以前から諏訪エリアの黒曜石の占有率が高く諸磯式期全体を通じて徐々に増加していくという他地域と異なる姿を確認することができた。さらに水晶については塩山の原産地から八ヶ岳まで移動していることが確認でき、研究成果が博物館企画展等を通じて社会に還元されるなど、水晶宝飾産業を地場産業とする山梨の水晶文化の解明に貢献した。