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Kannonji Castle

Kannonji Castle (観音寺城, Kannonji-jō) was a Sengoku period yamashiro-style Japanese castle located in what is now the Azuchi neighborhood of the city of Ōmihachiman, Shiga Prefecture, Japan. The ruins have been protected as a National Historic Site since 1982, with the area under protection expanded in 1984.[1] The castle was named after Kannonshō-ji, a Buddhist temple near the peak of the mountain.
Type:  Mountain castle (山城)
Built:  c.1468  
Builder:  Rokkaku clan  

Kannonji Castle  Click to go to Wikipedia