They are usually small architectural jewels, like the one in this photo, photographed at Seiryū-ji, in Aomori.
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/5.6
Shutter Speed: 1/640s
ISO Sensitivity: ISO 200
Muza-chan's Gate to Japan
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/5.6
Shutter Speed: 1/640s
ISO Sensitivity: ISO 200