The Sumida River (隅田川, Sumida-gawa) is a river that flows through central Tokyo, Japan. It branches from the Arakawa River at Iwabuchi (in Kita-ku) and flows into Tokyo Bay. Its tributaries include the Kanda and Shakujii rivers.
It passes through the Kita, Adachi, Arakawa, Sumida, Taitō, Kōtō and Chūō wards of Tokyo.