Minowa Castle was a "hirayama"-style (castle located in the Misato neighborhood of the city of Takasaki, Gunma Prefecture, Japan. The ruins have been protected by the central government as a National Historic Site since 1987.
Wikipedia https://en.wikipedia.org/wiki/Minowa_Castle
Address Japan
Coordinates 36°24'13.168" N 138°57'7.871" E