Pterostichus macrogenys Bates (Coleoptera: Carabidae) and its allied species of northern Japan are revised based mainly on the structures of the male endophallus (inner saceverted from the aedeagus). Seven species are newly described: P. shirakamisan sp. nov., P. takadateyamanus sp. nov., P. chokaisanus sp. nov., P. gassanus sp. nov., P. eboshiyamanus sp. nov., P. yahikosanus sp. nov., and P. iwakiensis sp. nov. Collection data and body-size differences among these species suggest the sympatric occurrence of large and small species in some localities. The implications of these results for the species-level taxonomy of this group are discussed.