Occurs in lakes and rivers of southern Japan. Also recorded from Lake Biwa (Ref. 78994). Highly important game fish (Mark Donachy, pers. Comm., 2001). Lake Biwa catch for native species has dropped from more than 8000 tons in 1972 to 2174 tons in 2000 while experts estimate catch of exotic species (black bass and bluegill exceed 3000 tons (Ref. 45327). Social and ecological problems have been experienced recently pertaining to the 'black bass problem.' (Ref. 55372). Considered to be one of the most damaging alien species in Japan (Ref. 53025). Also Ref. 6094, 53301.