New catalog of the Mosses of Japan prepared by Dr. Zennoske Iwatsuki (2004) is revised. This revised catalog lists all names of genera and species of mosses described or reported from Japan, based on literature available to the author up to the end of January 2016. The catalog is now comprised of 1270 species of mosses belonging to 342 genera. These taxa are listed in alphabetical order. Each valid epithet is followed by author citation, literature, distributional area in Japan, and Japanese name.