The Arakawa River or Ara River (Japanese: 荒川, Hepburn: Arakawa, "kawa" (川) already means "river") is a 173-kilometre (107 mi) long river that flows through Saitama Prefecture and Tokyo.[1] Its average flow in 2002 was 30 m3/s. It originates on Mount Kobushi in Saitama Prefecture, and empties into Tokyo Bay.[2] It has a total catchment area of 2,940 km2 (1,140 sq mi). | ||||||
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Length: 173 km (107 mi) | ||||||