Ōno Castle, Mountain fortress in Dazaifu, Japan
Ōno Castle sits on Mount Shiōji and consists of stone walls and earthwork fortifications built across the mountainside. The ruins show how the structures follow the natural terrain, with different sections connected by walls and defensive lines.
The fortress was built in 665 AD after a major military defeat, when Japan needed to strengthen its defenses against potential foreign threats. It became part of the country's strategy to protect its coastal regions.
Archaeological excavations within the castle grounds have revealed 70 building sites containing earthenware with calligraphy, roof tiles, and preserved rice from ancient times.
The ruins can be reached by bus from Dazaifu or Fukuoka Station, with a parking area nearby for visitors. Wearing comfortable walking shoes is recommended since exploring the site requires hiking across the hillside.
Underneath the stone walls lie sophisticated drainage systems that reveal how the builders managed water flow carefully at the site. Archaeological finds like ancient pottery and roof tiles are displayed where structures once stood.
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