Shimekazari is an amulet said to prevent the evil spirits to enter... And the orange visible in the photo is a daidai, a Japanese bitter orange which, because of a wordplay, is a symbol of family continuity. Daidai is normally written 橙, but it can be written also 代々, which means "from generation to generation"...
EXIF info:
Nikon Df
Lens: 35mm F/2D
Focal Length: 35mm
Aperture: F/2.8
Shutter Speed: 1/250s
ISO Sensitivity: ISO 200