The stone tiles at Maruoka Castle are very valuable. The Maruoka area where the castle is located is a region with heavy snowfall, so normal stone tiles cannot withstand the weight and easily break. Therefore, tiles made of Shakudani stone, which can only be quarried at Mount Ashiba near Fukui Station in Fukui Prefecture, are used. Shakudani stone is a very valuable stone that is no longer being mined. In addition, the stone walls use an old method called "nozura-zumi," where stones are irregularly stacked, but the characteristic is good drainage.
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