, also known as , is a flatland castle that was built in 1457 by
Ota Dokan. It is today part of the
Tokyo Imperial Palace and is located in
Chiyoda,
Tokyo, then known as
Edo, Toshima District,
Musashi Province.
Tokugawa Ieyasu established the
Tokugawa shogunate here. It was the residence of the shogun and location of the shogunate, and also functioned as the military capital during the
Edo period of
Japanese history. After the resignation of the shogun and the
Meiji Restoration, it became the
Tokyo Imperial Palace. Some
moats, walls and
ramparts of the castle survive to this day. However, the grounds were more extensive during the Edo period, with
Tokyo Station and the
Marunouchi section of the city lying within the outermost moat. It also encompassed
Kitanomaru Park, the
Nippon Budokan Hall and other landmarks of the surrounding area.