Rinodina endospora and R. macrospora are reported as new to Japan. These species are known to be rare in Northeastern Asia and have a disjunctive distribution. Rinodina endospora was collected on bark of Alnus sp. and Salix sp. at 290 m a. s. l. in Hokkaido, and R. macrospora was on bark of Abies mariesii at elevation between 1960 and 2000 m a. s. l. in Toyama Prefecture of central Honshu. The paper provides data on morphology, ecology, differentiation and distribution of two Rinodina species. Keywords: biodiversity, biogeography, lichens, new records, North-East Asia.