江戶城 Edo Castle

Edo Castle, today part of the Imperial Palace in Tokyo, was the center of power of the Tokugawa shogunate during the Edo period from 1603 to 1867 and was considered the largest fortress complex in Japan. Its history goes back to 1457, when the military strategist Ōta Dōkan had the complex built on a promontory above Tokyo Bay. After the structure fell into disrepair, Tokugawa Ieyasu decided to take advantage of its strategic position and expand the castle extensively. After his victory at the Battle of Sekigahara in 1600, he ruled the country from here. The complex followed the typical pattern of Japanese castles and consisted of the central main enclosure, the Honmaru, along with several outlying defensive rings. These areas were protected by deep moats, high ramparts, defensive towers, and fortified gate complexes. In front of the castle proper stood the estates of the most important retainers, which were likewise secured by walls and gates.

Today you can still see the remains of this massive defensive structure in the heart of Tokyo. The Honmaru was once occupied by a large residence, which was rebuilt after several fires, including the devastating Great Fire of Meireki in 1657. This residence was divided into a front section with audience halls and a Noh stage and a strictly secluded rear section, the Ōoku, where the shogun's women lived. A famous historical event took place in the so-called Great Pine Corridor, where in 1701 the conflict between Asano Naganori and Kira Yoshinaka escalated, leading to the legend of the 47 Rōnin. A memorial stone now stands at the presumed site of this corridor. Originally, a five-story main keep, the Tenshukaku, dominated the castle's appearance. It was not rebuilt after the great fire of 1657, since the shogunate, having eliminated its rivals, no longer feared any external threats.

After the Meiji Restoration in 1868, the castle was peacefully handed over to the imperial family and renamed Imperial Castle. The emperor initially moved into the residence in the western castle district before a new palace was built in 1888. The eastern and northern parts of the former complex are now open to the public and are used in a variety of ways. Many street names in Tokyo, such as Ōtemachi and Marunouchi, still recall the castle's original layout. The site was designated a Special Historic Site in 1963 and remains an important place for understanding Japan's political and military history.