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) Japanese gunboat Sumida (1903) "Sumida" was the first gunboat in the Imperial Japanese Navy inventory designed specifically for inland river service. The need for such a vessel to operate on the rivers of the Asian mainland to protect Japanese commercial interests at various treaty ports had been perceived even before the Boxer Rebellion. The Japanese government turned to the United Kingdom, and placed an order for such two such vessels in 1903: one the "Sumida" to John I. Thornycroft & Company and the other to Yarrow Shipbuilders in Scotland. "Sumida", was slightly larger than "Fushimi" and easily distinguishable by having