Japanese Kofun in Maps given by a Spaceborne Digital Elevation Model based on Multiple Satellite Data Sets

Here we stress the possibility to use maps from Spaceborne Digital Elevation Models to analyze the locations of Kofun, the ancient tombs in Japan. The DEM used is that proposed by Yamazaki, Ikeshima,Tawatari, Yamaguchi, O'Loughlin, Neal, Sampson, Kanae and Bates, in 2017, and implemented at the web site https://it-ch.topographic-map.com . On Kofun and their orientation, a large literature in Japanese exists. In Italian, detailed discussions have been provided by G. Poncini in the Enciclopedia dell' Arte Antica  (1995) and M. Hudson about archaeology in Japan 2002.