Bryde¡¦s whale (Balaenoptera edeni) is a species of baleen whales widely distributed throughout the tropical and temperate waters and does not migrate for long distance. Phylogenetically, the population in Tosa Bay, which includes about 43 individuals identified, belongs to the East China Sea Stock and it behaves between migratory and non-migratory forms. Studies on acoustic signals and individual identification could help us understand Bryde¡¦s whales in Tosa Bay more. Between August and December 2008, two sound types were recorded and analyzed. The sound type Be8a was considered as feeding call, while the nonpulsed moan was considered associated with mother-calf communication during separation. In this study period, other 31 individuals were identified and added into the catalogue. Bryde¡¦s whales are distributed very limited. Concentration of individuals was found in central Tosa Bay between spring and early autumn and it shifted southwestern in late autumn and winter. This study suggests that the East China Sea Stock may separate into two or more communities and the population in Tosa Bay belongs to the northern community.