Watanabe no tsu, one of the biggest seaports on the coast of Seto Inland Sea, used to be located near the river mouth of the Kyu-Yodo-gawa River (former Yodo-gawa River) in the Settsu Province.
渡辺津（わたなべ・の・つ）は、摂津国の旧淀川河口近くに存在した、瀬戸内海沿岸で最大級の港湾。