Château de Kajiyashiro

Kajiyashiro Castle is a medieval fortress in Nagasaki Prefecture, Japan, situated on a hilltop that commands views of strategic routes through the region. The structure features stone foundations and wooden reinforcements typical of feudal Japanese castles, with the natural terrain serving as part of its defensive system.

The fortress was built during the Sengoku period when regional lords needed fortified positions to defend their territories in western Japan. It became part of the strategic networks that protected trade routes and military interests along this coastal area.

The name refers to the local smithing tradition that once flourished in this region. Walking through the ruins, you can sense how this fortress was woven into the daily life and economy of the surrounding communities.

Visitors can reach the castle ruins by following hiking trails that lead to elevated viewpoints offering views across Nagasaki's coastal landscape. Sturdy footwear is recommended since the paths are uneven and can be slippery during or after rainfall.

This castle is less well-known than Japan's major fortress sites, offering those who make the effort to hike up a quieter, less-visited experience. The remains reveal how a smaller garrison operated far from the kingdom's main power centers, with its own local importance.