Only the walls of the original Obi-jō are intact, but the grounds have six important buildings, including the impressive, painstakingly reconstructed Ōte-mon gate and Matsuo-no-maru , the lord's private residence. The museum has a collection relating to the Itō clan's long rule over Obi. Yōshōkan , formerly the residence of the clan's chief retainer, stands just outside the castle entrance and has a large garden with Mt Atago (Atago-san) as 'borrowed scenery'.
