Have you ever seen stone walls this high?

The East Garden is where most of the administrative buildings for the palace are located and encompasses the former Honmaru and Ninomaru areas of Edo Castle, a total of 210,000 m2 (2,300,000 sq ft).

 Located on the grounds of the East Garden is the Imperial Tokagakudo Music Hall, the Music Department of the Board of Ceremonies of the Imperial Household, the Archives and Mausolea Department Imperial Household Agency, structures for the guards such as the Saineikan dojo, and the Museum of the Imperial Collections.

Several structures that were added since the Meiji period were removed over time to allow construction of the East Garden.

In 1932, the kuretake-ryō was built as a dormitory for imperial princesses, however this building was removed prior to the construction of the present gardens.

Other buildings such as stables and housing were removed to create the East Garden in its present configuration.

Construction work began in 1961 with a new pond in the Ninomaru, as well as the repair and restoration of various keeps and structures from the Edo period. On 30 May 1963, the area was declared by the Japanese government a "Special Historic Relic" under the Cultural Properties Protection Law.