The Sumida River (隅田川; Sumida-gawa) is a river in eastern Tokyo that starts at the Iwabuchi Sluice Gate in Kita and flows into Tokyo Bay. There is a walkway along its bank almost everywhere along the way. Here are photos of the walk starting from Asakusa and going north to Minami-Senju, in Arakawa City.
Above, Sumida River from the Tokyo Skytree observatory.
Above, Tokyo Skytree, a near constant sight when walking along the river.
Above, homeless settlement.
Above, Ishihama Shrine.
Above, in Shioiri Park (汐入公園).
Above, north of Minami-Senju station. The walkway stops there and starts again upstream (a bit far away though, so I stopped there).