Much interaction exists between its southern part, which is located along the Katsura-gawa River (Yodo-gawa River system) and its northern part, which is located along the Yura-gawa River, but it cannot be said that the area constitutes a single cultural area, due to the slight differences in dialect which exist between the two regions.
地理的には南部が桂川(淀川水系)流域、北部が由良川流域であり、普段から交流も多い地域であるが、文化圏としては方言など多少の差異もあり、必ずしも単一とはいえない。