Abstract
This study extracts common words characterizing independent environmental reports of Japanese firms which also disclose the environmental conservation costs in the reports, and examines the relation between such common words and the amount of environmental conservation costs. The result shows that the common words associated with the firms group, which expends more for environmental conservation activities, generally relate to 'CSR' or 'pollution problem', whereas those for the firms with relatively small expenditure relate to 'market' or 'customer satisfaction'.