Nagashino Castle - Credit: Wikimedia Commons
was a Sengoku period Japanese castle located in what is now Shinshiro, eastern Aichi Prefecture, Japan. It is noteworthy as the site of the crucial Battle of Nagashino between the combined forces of Tokugawa Ieyasu and Oda Nobunaga against Takeda Katsuyori in 1575. The ruins have been protected as a National Historic Site since 1929, the first time a former castle site had received such protection. Read more on Wikipedia
Source: en.wikipedia.org