The massive stone base of the castle keep, the Tenshudai, measures roughly 41 by 45 meters and is the only remnant of the original structure.
The garden was opened to the public in 1968 after being part of the private imperial grounds.
The Fujimi-yagura, a three-story watchtower, is one of the few original defensive structures that survived the 1657 fire.
The garden serves as a seasonal transition point for the Imperial Household Agency's official tree collection, featuring species from all 47 prefectures of Japan.
The stone walls were constructed using 'ishigaki' techniques, specifically designed to withstand earthquakes and facilitate drainage.
The site contains the remains of the Chushingura incident's historical legacy, as the lord Asano Naganori was ordered to commit seppuku within these walls.
The garden layout utilizes the original elevation changes of the Edo castle layout to create distinct tiers of observation.
The Imperial Palace East Garden occupies the former site of Edo Castle's innermost circles of defense, the Honmaru and Ninomaru. Visitors can explore the massive stone foundations of the former five-story castle keep, which burned down in the Great Fire of 1657 and was never rebuilt. The garden contains the Tenshudai, a raised stone platform that offers an elevated view of the surrounding grounds. Its landscape design incorporates both traditional Japanese garden elements and manicured lawns. The site is managed by the Imperial Household Agency, preserving the historical integrity of the Edo-period fortifications. Extensive stone moats and massive watchtowers, known as yagura, remain intact throughout the perimeter. The area connects the historical legacy of the Tokugawa Shogunate with the administrative center of modern Japan.
The elevated viewing platform at the Tenshudai offers the best panoramic perspective of the stone foundations and the garden greenery.
Carry a physical coin or token provided at the entrance gate, as you must return it when exiting.
Wear comfortable walking shoes, as the paths consist of uneven gravel and steep inclines near the castle ruins.
Visit the Ninomaru Grove, which is specifically curated to showcase a variety of Japanese maple trees.
Do not attempt to enter the inner Imperial Palace grounds, which require separate, advance reservations for guided tours.
Closed on Mondays and Fridays, as well as during select national holidays and for private imperial events.
No drones are permitted; stay strictly on marked paths; do not enter restricted areas marked by signage.
