In order to help the tourists, some castles installed bamboo handrails... but from the castles visited until now, the most interesting was the solution from the Maruoka castle: the stairs have been provided with knotted thick ropes hanging from the upper floor...
EXIF info:
Nikon D90
Lens: 8-16mm F/4.5-5.6G
Focal Length: 16mm
Aperture: F/5.6
Shutter Speed: 1/80s
ISO Sensitivity: ISO 640