更新日：2024年2月27日

Tenshudai(Foundation of the Castle Keep)

Tenshudai(Foundation of the Castle Keep)

The tenshudai is a slightly distorted square, with one side being 21m long.

A protrusion, referred to as hachimandai, can be seen on the west side.

The east side features another protruding section, called tsukeyagura, which is currently being used as the entrance to the reconstructed castle keep.

It is widely believed that the castle keep was built by the second lord of the castle, HORIO Yoshiharu, when he lived here in around 1590.

However, there are no remaining depictions of the keep from 17^th century drawings and it is believed that the castle keep was completely destroyed in the early Edo period.

The current reconstructed castle keep, built in 1958, is much smaller compared to the size of the tenshudai.

There is also a credible theory that Hamamatsu Castle was once a bōrō-style castle, potentially having had a small watchtower with a large roof placed on the lower part of the castle since the time of its construction.

Judging from the size of the foundation of the castle keep, it is reckoned that the original Hamamatsu Castle keep was gigantic, spanning over four external layers and five internal floors, making it one-size larger than the current reconstruction.