As a result of the River Act, which was proclaimed in 1964 and implemented in the following year, the name of the Kamogawa (Kamogawa River) from the starting point to the entire downstream is officially written as 鴨川 in kanji; however, the Kamogawa River upstream from the junction with the Takano River (Kyoto City) is conventionally written as 賀茂川 or 加茂川.
1964年（昭和39年）公布、翌年施行の河川法により、起点よりすべて鴨川の表記に統一されているが、通例として、高野川(京都市)との合流点より上流は賀茂川または加茂川と表記される。