Although the messengers from heaven met Okuninushi at Inasa-no-Hama beach, the rush to go ask his son Kotoshironushi for the land, and Kotoshironushi’s relinquishing of it is celebrated every year in two rituals at Miho Shrine, home to Kotoshironushi, also popularly known as Ebisu.
Both rituals bring together the whole neighborhood and draw crowds from around the area, and the entire process goes on for hours, including purification rites for the people taking roles and kagura dances performed by the miko (shrine maidens).
Morotabune Shinji is celebrated every December 3rd, and reenacts the rush to the shrine with two boats of lightly dressed men racing each other around the harbor and liberally splashing water on each other with their oars. Yes, the water and weather are both very cold. However, I am told that the men taking part are so absorbed in the moment that they don’t notice the biting cold.
The other is Aofushigaki Shinji, on April 7th. The 7th of every month is a holy day for Miho Shrine, with their treasure storehouse only open on the 7th day of the month, with a few items on display each time it is open. The April 7th ritual reenacts how Kotoshironushi hid himself in the bushes and the water after agreeing to hand over the lands. While this is not necessarily a suicide, it is thought of as a sort of rebirth, and there are many somber elements of the ritual that take place before the boats are even involved. A number of roles are performed by community members which require the adults and children involved to eat special food, or be lead blindly, or not be allowed to have their feet touch the ground, and the majority of other people involved guide, carry, or form chains around the processing members to keep them out of reach of the onlookers. It makes for a rather mysterious atmosphere.