Abstract
Although there were some which have been discussed about the civic agreement formation technique also in previous research of old city planning, the purpose was placed by introducing as a technique and they were hardly verified about the rationality of the technique. Then, this paper tries to analyze the bearer of a "city planning event" based on backing of a positive field survey, to add the viewpoint of "systematization of participation" which was not in the conventional city planning about the mechanism of decision-making of a community, and to express in a new form. The mechanism is explained by the existence of a community recognized possible in the form where the shift was orderly paying attention to the point changed in the participating opportunity for the bearer of movement to have been restricted.