A sacred ritual to pray for a good harvest was held in Rokusho-no-miya (Ōkunitama Shrine) every year on the sixth day of the fifth month of the old lunar calendar. In this ritual, naked children held sumō matches on paddy fields that were already bedded out with rice plants. It is said that on the following morning, young plants which had been devastated during the sumō matches would stand up straight and the various plants brought together by farmers would come into ears all at once in the harvest time.