Ceremony ceremony three years into four newscasts or sheaves of rice will be held 3 times per year, is 3 years old ... has 4 times the ceremony will be held in the capital city of Jinja shrine 3 days out-of-date village.
So the city turn-off (battle of the Dutch ancestors inventories), maintenance and community morale, or solve the problem with risks guess prediction.
There is also a belief, "home" is a cornerstone at middle village, and every year there is a ritual to bribe a Ghost Master Home.