Sumida River Sumida River The is a river that flows through Tokyo, Japan. It branches from the Arakawa River at Iwabuchi and flows into Tokyo Bay. Its tributaries include the Kanda and Shakujii rivers. What is now known as the "Sumida River" was previously the path of the Ara-kawa. However, towards the end of the Meiji era work was carried out to divert the main flow of the Ara-kawa to prevent flooding. It passes through the following wards of Tokyo: Sumida Gawa pottery was named after the Sumida River and was originally manufactured in the Asakusa district near Tokyo by potter Inoue
Arakawa River (Fukushima) ineffective, and the river continued to periodically flood, culminating in a large-scale flood on August 5th, 1986. In 2004 the Arakawa River's flood control system was completely overhauled, and 13 new check dams were built along the main river and numerous other dams built on its tributaries. In 2008 the Agency for Cultural Affairs designated the Arakawa First Check Dam as a Registered Tangible Cultural Property. In 2007 the Arakawa River tied with six other rivers for having the best quality river water in country based on biochemical oxygen demand tests conducted by the Ministry of Land, Infrastructure, Transport and