Machiya were built with both living and working spaces, being at the same time homes and shops (or workshops). Made from wood and being quite old, they are at high risk for fires and earthquakes and are costly to maintain in the today's world. So, during the last decades, many of them were demolished.
Fortunately, they won't disappear altogether. I saw some machiya converted into restaurants, coffee shops or modern workshops... And, of course, some of them are protected by preservation laws.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/40s
ISO Sensitivity: ISO 200