A hamaori (down the beach) festival of the kaichu-togyo type held at the Samukawa-jinja, Kanagawa on July 15th. Starting early in the morning several mikoshi are carried to the beach about five miles away from the shrine and with a great deal of noise and jostling are taken into the sea as a form of misogi or purification. The rowdier the festival, the better the kami are pleased. The misogi is followed by a formal rite on the shore.
A Popular Dictionary of Shinto. Brian Bocking.