However, because the region in Definition 4 is under the control of Yamashiro Wide-area Promotion Bureau of Kyoto Prefecture and Muko City, Nagaokakyo City, and Otokuni County among that region often regarded as a part of Kyoto City geographically and economically, therefore, the region in Definition 5 in Yamashiro area is often regarded as southern region of Kyoto Prefecture in a narrow sense.
しかし、4は京都府の山城広域振興局の管内地域であり、その中の向日市、長岡京市、乙訓郡は地勢上も、経済上も京都市と一体にされることが多く、5の山城地区を狭義の京都府南部地域として扱われることが多い。