2006 Fiscal Year Final Research Report Summary
The Archaeological geographic study in Osaka Plain of Ritsuryo era allowing for Micro-topographic reconstruction by data of archaeological investigations and archaeological specimens
| Project/Area Number |
17520521
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Archaeology
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| Research Institution | Naruto University of Education |
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Principal Investigator |
KIHARA Katsushi Naruto University of Education, College of Education, Professor, 学校教育学部, 教授 (10234329)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Data of archaeological investigation / Micro-topographic reconstruction / Ancient Osaka Plain / Historical Landscape / Archaeological geography |
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| Research Abstract |
This study is intended for the Osaka Plain. I made a Osaka topographical map by one meter contour line between the seventh century and eighth century allowing for results of archaeological investigations, geologic columnar sections and natural or artificial land subsidence. Moreover as a base map it, investigated historical landscapes around Naniwa capital, structures of Naniwa capital, a transportation network around Naniwa capital, artificial canals in the Kawachi Plain, characteristics and constructed age of Johri land allotment systems at the Osaka Plain. The main results of investigation are as follows.
(1) In the eastern side of the Uemachi hill projecting as a peninsula from southern Kawachi, a vast bay called the Kusakae stretched to the foot of the Mt. Ikoma. Considering levels of excavated remains near Osaka Bay, sea level in those days was 80 centimeters below present sea level.
(2) The depth of the Kusakae was between 4 meters and 5 meters at the west, between 6 meters and 7 meters at the east.
(3) The central Palace area and Jobo city of Naniwa capital began to construct in the latter half of seventh century and was completed in the first half of eighth century. That scale is 4.2 kilometers north and south, 2.1 kilometers east and west, is much smaller in comparison with Fujiwara and Heijoh capitals.
(4) I was able to restore sites of Sukita Horikawa by Gyoki, canal between Yodo river and Mikuni river and Kawachi canal by Wakenokiyomaro that was dug artificially to prevent floods of Kawachi Plain in eighth century.
(5) The large of Johri land allotment systems overlaps areas to reside except waters of Kusakae and so on. Perhaps those were constructed about eighth century except uncultivated areas by topographical conditions.
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Research Products
(2 results)
