SHIBATA castle is located in the north-eastern part of NIIGATA prefecture. Feudallord HIDEKATSU MIZOGUCHI began the construction of the castle on flat land in 1602. The castle compound was in a very advantageous position from the standpoint of defense, because three sides were surrounded by marshland. On the other hand the ground of the compound itself was soft, so it must have been difficult to decide whether that particular location was suitable for the costruction of the castle or not. This study is to clarify the reason why SHIBATA castle, which was built on soft ground, exists as it did, by analyzing geology of the castle, thereby to show the appropriateness of the selection of that particular location.
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