'Heavenly-emperor kappa festival'. A festival held in Tokyo at the Ebara jinja, Shinagawa during the weekend nearest to June 7th. The festival is held to pray for a good harvest and success in the fishing industry, and the mikoshi which form the procession are borne into the sea. The name of the festival flatters the kappa with the title of 'heavenly emperor', evidently to win his favour as the deity of water.
A Popular Dictionary of Shinto. Brian Bocking.