In the front of this photo, the sharp bamboo fences installed on the roof are called shinobi-gaeshi, and their role was to prevent thieves from climbing to the roof. In the background of the photo you can see another interesting element, a miniature tower called kemuridashi-yagura, an opening designed for smoke dissipation.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 24mm
Aperture: F/5.6
Shutter Speed: 1/2500s
ISO Sensitivity: ISO 320