Arakawa River (Kantō) Arakawa River (Kantō) The is a long river that flows through Saitama Prefecture and Tokyo. It originates on Mount Kobushi in Saitama Prefecture, and empties into Tokyo Bay. It has a total catchment area of . The river is one of Tokyo's major sources of tap water, and together with the Tone River, accounts for around 80% of Tokyo's water supply. Attempts to control flooding of the Arakawa River have been made since the area that is now Tokyo became the de facto capital of Japan during the Edo period. Following a major flood in 1910 that damaged a large
Japanese gunboat Sumida (1903) one smokestack to "Fushimi's" twin stack. "Sumida" was launched in June 1903, but was brought to Shanghai for final fitting out, but work was halted by official British neutrality in the Russo-Japanese War, the unfinished ship was impounded in until the end of that conflict. She was finally commissioned into the Japanese navy as a second-class gunboat on June 17, 1906. "Sumida" remained based at the International Settlement in Shanghai. During World War I, due to the official neutrality of the Republic of China, "Sumida"'s weaponry was placed under lock in 1914, and was not freed until China officially joined