It was located in the wetlands where the Kamo-gawa River (The Yodo-gawa River System) and the Katsura-gawa River (The Yodo-gawa River System) merged, and at that time, the Kamo-gawa River ran through the east of Toba, and in the south, it was adjacent to the Ogura-ike Pond.
鴨川(淀川水系)と桂川(淀川水系)の合流地点の低湿地にあり、当時は鴨川が鳥羽の東側を流れ、また南は巨椋池に接したとされる。