On the porch or the entrance door it is placed the shimekazari, a small rope made from rice straws, with carefully crafted zigzag-shaped paper strips called shide.
It has the same role as the shimenawa from the Shinto shrines - to keep the bad spirits away...
But the shimekazari is also decorated with auspicious items: the daidai, a Japanese bitter orange is considered a good omen because if "daidai" 「橙」 is written with a different kanji 「代々」 can be translated as "from generation to generation". The lobster is also an auspicious item, being a symbol of extreme old age (because the lobster's body is leaning like the body of an old man). The pine twigs are symbols of power and longevity, because they are green all the time and the fern leaves are symbols of hope and desire to have a happy family, growing from generations to generation...
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 44mm
Aperture: F/5.6
Shutter Speed: 1/80s
ISO Sensitivity: ISO 320