Edo-jo castle was build up with Honjo (the keep of castle) consisting of Honmaru (inner citadel), Ninomaru (second citadel) and Sannomaru (third citadel), Nishinomaru palace, Momiji-yama Mountain, Fukiage garden, Nishinomarushita (西丸下) (residence of the Matsudaira clans).
江戸城内曲輪は、本城(本丸、二の丸、三の丸)、西丸、紅葉山、吹上御庭、西丸下で構成されていた。