This paper shows an example application regarding the disclosure of our research project on ancient stone coffins in North and East Harima (播磨) (Hyogo prefecture,Japan).We collaborated with cultural resource management officers in local governments in North and East Harima.We have already published paper map of stone coffins from their data,but this map has functional limits for usage of positon data.Therefore,we decided to apply the Geographical Information System (GIS).However,the high resolution,large scale background map could possibly lead to some security problems for guarding the cultural heritage sites.To solve this problem,we considered four methods: showing the locations with relatively large markers,only providing the approximate address names without using markers,rounding off the coordinate values and ranging of the scales users can access so that they cannot reach the precise information.We discuss the reasonability of each methods depening on the case.Archaeologists and cultural resource management officers should regard this problem and these methods as an important issue.What must be avoided is putting the security of the cultural heritage sites in danger due to neglect of considering the importance of “G-I-Security”.