As in other areas of the world, some lichens are extinct, endangered, vulnerable or rare in Japan. The threatened species for this country were nominated a Red List by Kurokawa and Kashiwadani (1993) and include 75 species. In this paper a revised list including 82 threatened species is presented. Those found in high mountains are least threatened while temperate and subtropical species in well populated areas are at risk from factors such as air pollution, urbanization, quarrying, and from forestry practices, especially Cryptomeria plantations.