Sendai Castle (Aoba Castle Ruins).

“Aoba Castle (Aoba-jō) is a Japanese castle located in Sendai, Miyagi Prefecture. Throughout the Edo period, Aoba Castle was home to the Date clan, daimyō of Sendai Domain. The castle was also known as Sendai-jō or as Gojō-rō. In 2003, the castle ruins were designated a National Historic Site.”