The American Geographical Society Library (AGSL), one of the premier collections of its kind in North America, contains over 1.3 million items supporting instruction, research and outreach at the University of Wisconsin-Milwaukee and around the world. The collection contains maps, atlases, books periodicals, film media and digital data files. Its scope is worldwide with coverage from the 15th century to the present.
Stanford University Libraries holds a large collection of Japanese military and imperial maps, referred to as gaihōzu, or "maps of outer lands." These maps were produced starting in the early Meiji (1868-1912) era and the end of World War II by the Land Survey Department of the General Staff Headquarters, the former Japanese Army. This portal allows you to search for the maps geographically through an index and then download the images at multiple resolutions.
The Tokyo National Museum keeps a large number of maps from the Edo period (including some made overseas). Some of them are academically valuable as historical materials, such as the map of Japan created by Tadataka Ino.