As you wander through Japan, you'll encounter shimenawa everywhere — across the entrances of shrines and temples, on torii gates, around trees and rocks, and hung on four poles surrounding a hassokuan (8-legged table).

They frequently have shide or straw decorations hanging from them. And can be anything from a simple hemp rope to a multi-ton behemoth made of rice straw.

shimenawa delineate sacred space. That which is within is an intrusion of the supernatural into the world of men, and needs to be treated with respect and care.

shimenawa serve two basic purposes:

First as a reminder — do not approach when polluted. Most kami intensely dislike pollution and avoid it whenever possible. They will not appreciate your bringing pollution before them, and are unlikely to descend or grant your prayers

And second as a warning — enter at your own risk. This a place of power — a live wire as it were! A wrong action or word could have catastrophic consequences, both for you and your family and neighbors.