Takeda Castle, Japanese castle ruins on Mount Shiroyama in Asago, Japan
Takeda Castle is a set of stone foundations arranged across a wooded hilltop in Hyōgo Prefecture, with terraced walls marking where buildings once stood. The layout follows the natural contours of the mountain, creating a series of connected platforms that reveal the original defensive structure.
Built around 1443 by Otagaki Mitsukage, a retainer of Yamana Sōzen, Takeda Castle guarded the Ikuno silver mine and the border between Harima and Tajima. Akamatsu Hirohide rebuilt it with stone walls and dry moats around 1585. After Sekigahara, its lord was forced to commit seppuku and the castle was abandoned in 1600.
The nickname "Castle in the Sky" comes from the river fog of the Maruyama River, which often leaves the summit above a cloud sea. Another name, Kogajo ("Crouching Tiger Castle"), refers to the layout of the enclosures, said to resemble a tiger lying down. The amateur photographer Toshihisa Yoshida helped spark the cloud-sea boom when his photo ran on a newspaper front page in 2007.
Two footpaths lead up from the railway station to the ruins, with the climb taking around 40 minutes. A shuttle bus operates during peak visiting seasons in autumn and spring, making the ascent easier for those who prefer not to hike.
On clear autumn mornings a layer of clouds forms below the summit, making the ruins appear suspended above a white sea. This weather phenomenon occurs only under specific conditions and transforms the site into a scene from a folktale.
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