Groundwater Research Group in GSJ has already published five Water Environmental Maps during the past six years, and we have received many comments and requests from users in this period. In addition, strengthening of cooperative framework with other groups and institutes is necessary to improve the map to our future vision. So, we needed to change and publish the edit guideline for the Water Environmental Maps. We determined this guideline, based mainly on contributed user comments and review of published hydrogeological maps of Japan and other countries. Consequently, we decided to construct three main hydrological items for new Water Environmental Maps, which contribute regional groundwater and geo-heat utilization.