[2] Hōjō Sōun who had been fighting with the Miura clan built the castle to avoid being attacked from behind by the Ōgigayatsu Uesugi clan's relief army.

[4][5] During the siege of Odawara in 1590, Hōjō Ujikatsu entrenched himself in the castle but was besieged by a big army of the Tokugawa Ieyasu.

[3] After the Siege of Odawara, Tokugawa Ieyasu placed his reliable retainer Honda Masanobu.

Tamanawa castle was abandoned in 1703 when Nagasawa Matsudaira clan transferred to the Otaki Domain.

[3] There are little remains of the castle on the present day site, just some moats and earthworks.