Ishigakiyama Ichiyajō Historical Park, Historical park in Hayakawa, Japan.
Ishigakiyama Ichiyajō Historical Park is a ruined fortress site on a forested hill in Hayakawa, Japan, where stone walls, terraced earthworks, and defensive enclosures are still standing. The layout follows the natural contours of the hill, with paths connecting the different levels of what was once a large military compound.
The fortress was built in 1590 on the orders of Toyotomi Hideyoshi during the siege of Odawara, and the construction was completed in a matter of weeks. Once the siege ended and the opposing lord surrendered, the site was abandoned and never repurposed.
The park sits on a hilltop overlooking the coast and the surrounding mountains, and visitors can walk the terraced levels and stone walls as they stand today. The name of the site refers to a single night in which the entire structure seemed to appear from nowhere, a story that is still told at the site.
The site can be reached from the nearest train station by foot or by bus, and the walk up the hill takes some time. Sturdy footwear is a good idea since some sections of the path are steep and can become slippery after rain.
The site is one of the earliest known examples of nozurazumi, a technique of stacking uncut natural stones to build walls, which was still new at the time. This method spread across Japan after this construction and can be seen at many later castle sites.
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