Abstract
Since govemmental activities on the odor problem are usually initiated by public complaints, it is necessary to know the structural factors of such complaints. This study aims to know the source of public complaints against odor. The number and frequency of public complaints are annually counted by local governments. Those data were analyzed by several statistical procedures. As a result, the regional and temporal variations of the number of complaints originated not only in the distribution of odor sources but also many factors such as public temperament in each region.