Toba (Kyoto City) is located 3km south of Heian kyo and at the confluence of the Kamo-gawa River (Yodo-gawa River water system) and Katsura-gawa River, and was a traffic choke point where the Sanyodo also run through.
鳥羽_(京都市)は、平安京の南約3kmに位置し、鴨川(淀川水系)と桂川の合流地点で、山陽道も通る交通の要衝であった。