Kōkukuji Castle

Kōkukuji Castle - Credit: Wikimedia Commons

was a Sengoku period yamashiro-style Japanese castle located in the Negoya neighborhood of the city of Numazu, Shizuoka prefecture. The ruins have been protected as a National Historic Site since 1975. Read more on Wikipedia

type: military structure
date from: 15th century

Source: en.wikipedia.org