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
Capital Cities and Tombs of the Ancient Koguryo Kingdom main Goguryeo capital moved to Pyongyang. Wandu contains many vestiges including a large palace and many tombs. The capital cities of the Goguryeo are an early example of mountain cities later imitated by neighbouring cultures. The system of capital cities represented by Gungnae City and Wandu Mountain City also influenced the construction of later capitals built by the Goguryeo regime. The capital cities of the Goguryeo represent a perfect blending of human creation and nature whether with the rocks or with forests and rivers. The site includes archaeological remains of 40 tombs which were built by Goguryeo, which was founded