After merging with Omuro-gawa River, it flows further southwards in parallel with Tenjingwa-dori Street (National Route 162/the Utanokisshoin Line of Kyoto Municipal Route 184) before reaching Nishi-Kyogoku, finally being merged into Katsura-gawa River (Yodo-gawa River system) in Kisshoin Shimonomukai-cho, Minami Ward.
御室川合流から西京極まで天神川通（国道162号・京都市道184号宇多野吉祥院線）と並行してさらに南流し、南区吉祥院下ノ向町で桂川(淀川水系)に注ぐ。