A riverside shrine in Kurume, Kyushu dedicated to Ame-no-minaka-nushi, Koreimon-in and her son, the unfortunate child-emperor Antoku as deities of water and of easy birth. The shrine has numerous bunsha including the Tokyo suiten-gu where Antoku is worshipped as a kami governing water. The spring festival on May 5th includes a boat crossing of the Chikugo river.
A Popular Dictionary of Shinto. Brian Bocking.