[1] Takatenjin Castle is located in southeast part of the center of modern Kakegawa on the road towards the eastern seaside area of Tōtōmi province.

Located on Mount Kakuo, a 200-meter mountain with sheer cliffs accessible only by a narrow pathway, the castle was traditionally held to be the "key" to securing Tōtōmi Province and the Tōkaidō highway, which is eleven kilometers to the south.

The clan was later suppressed during the reign of Imagawa Yoshimoto for siding with his enemies during an internal power struggle.

However, this glory was short-lived, as the following year the Takeda clan suffered severe losses against the Oda-Tokugawa alliance and found it impossible to keep the supply lines to Takatenjin Castle open.

A faux tenshu was constructed on the summit before World War II, but was subsequently destroyed by lightning and only a concrete base remains.