Shimenawa are lengths of laid rice straw or hemp rope used for ritual purification in the Shinto religion.

Shinto is a religion originating from Japan. Classified as an East Asian religion by scholars of religion, its practitioners often regard it as Japan's indigenous religion and as a nature religion. Scholars sometimes call its practitioners Shintoists, although adherents rarely use that term themselves. There is no central authority in control of Shinto, with much diversity of belief and practice evident among practitioners.