Formerly a marsh located on the northern edge of the Nagoya Plateau, the Ofukemaru is said to have been reclaimed with pine and many other trees at the time of the castle's construction. It is also known as the Fukaimaru.
Necessary arms and ammunition, outside that which the retainers had in their own possession, were stored in the facilities called Ozutsu-gure, Tezutsu-gura, Migaki-gura, and Ana-gura. A Shio-gura (salt storehouse) was located in the eastern corner. The warehouses have almost all disappeared, and some teahouses are now there instead.
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