Since 'Kamo-gawa River (鴨川)' is commonly considered to indicate the rivers which are designated by River Act as 'the class A river Yodo-gawa River system Kamo-gawa River', it is supposed to include the north area of the meeting of Kamo-gawa River and Takano-gawa River as well, although the river of the area is written as '賀茂川' or '加茂川' (the pronunciations are the same as '鴨川').
また、「鴨川」は、河川法により一級河川淀川水系鴨川に指定された河川を指すため、通例としては賀茂川または加茂川と表記されている部分（高野川との合流点より以北）を含む。