Ogyū Castle

Ogyū Castle - Credit: Wikimedia Commons

was a Sengoku period flatland-style Japanese castle located in the Ōuchi neighborhood of the city of Toyota, Aichi in the Tōkai region of Japan. The ruins, together with other sites in Matsudaira-gō associated with the Matsudaira clan, have been collectively protected as a National Historic Site since 2000. Read more on Wikipedia

type: military structure
date from: Muromachi period

Source: en.wikipedia.org