Geospatial Information Authority of Japan (GSI), a special organization of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT), operates web maps "GSI Maps" (https://maps.gsi.go.jp/) (Figure 1). GSI Maps is the showcase of geospatial information developed by GSI and can be used with various devices and web browsers. GSI Maps is one of GSI’s important efforts to realize a society that everyone can get and utilize geospatial information anytime, anywhere.