However, the land of Ukyo did not become developed for dwellings even during the 9th century, due to it being a wetland formed by the Katsura-gawa River (of the Yodo-gawa river system).
もっとも、右京の地は桂川(淀川水系)の形作る湿地帯にあたるため9世紀に入っても宅地化が進まなかった。