In today's photo you can see the main gate, a construction in the style yagura-mon (which means that it features a yagura tower built on top) and two corner turrets (sumi yagura) connected by a nagaya yagura, a long construction used as storehouse.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/7.1
Shutter Speed: 1/320s
ISO Sensitivity: ISO 200