Shinshi
The "Chujin Harai-kun," a book written in the 12th century, states that the kami's messenger is second only to the eight great kami and is subordinate to the 100,000 kami. Moreover, "Kitakami Yuki-fu," an essay written in the early 19th century, explains that a ritual called hanasui-iwai is held every year on January 15th. During this ritual, every new household is given a Shinshi.