Iiyama Castle

Iiyama Castle - Credit: Wikimedia Commons

was a hirayama-style Japanese castle located in what is now part of the city of Iiyama, Nagano prefecture. It was the headquarters for Iiyama Domain under the Edo period Tokugawa Shogunate and its ruins are now a public park. Read more on Wikipedia

type: military structure
date from: Year Unknown

Source: en.wikipedia.org