Originally appeared in the architecture of the Zen temples, the katomado windows were later borrowed by Shinto shrines, samurai residences or even castles. The katomado name has an interesting story: mado means "window", and originally kato meant "fire light", because the shape resembled a flickering flame, so the name meant "fire light window". However, it was considered that fire isn't a good omen for a wooden building, so the kanji used to write kato was changed, and the new meaning is "flower window"...
EXIF info:
Nikon D300
Lens: 8-16mm F/4.5-5.6G
Focal Length: 8mm
Aperture: F/7.1
Shutter Speed: 1/250s
ISO Sensitivity: ISO 320