The tree was often selected in a silent forest area, and simply marked with a shimenawa. Even today, many Shinto shrines are located deep in the forest, their presence marked with torii gates and sometimes with lanterns, like in this photo taken near the Hakone Shrine.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 34mm
Aperture: F/5.6
Shutter Speed: 1/30s
ISO Sensitivity: ISO 400