Also, certain elements were conceived to make the wearer scarier, like the menpō facial armor featuring frowning expressions, grinning teeth or thick mustaches.
From an aesthetic point of view, the most interesting part is the helmet, kabuto in Japanese. Having an important identification role, kabuto was decorated with one or multiple crests, the one on the front - called maedate - being over-sized and representing the clan's emblem, stylized horns, mythological creatures or protection symbols.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 22mm
Aperture: F/5.6
Shutter Speed: 1/60s
ISO Sensitivity: ISO 400