Abstract
Characteristics of newspaper articles on the disputes of Nagara coffer-dam construction are dealt with in this paper. Information source and entropy hypothesis is applied to the data of newspaper articles of five popular papers. The data of two years from 1991 to 1992 are divided into those of supporter and those of oppsiter to the construction and also classified into five categories from the points of contents. Analytical results show that the difference of the information entropy is little between the data of supporter and oppositer though the latter is much larger than the former. And also the results of factor analysis clarified the trend change in the tone of arguments and characteristics in each newspaper.
