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Inland Sea

Relief map of Inland Sea

The Inland Sea is a navigable waterway bounded by the Japanese home islands of Honshu, Kyushu, and Shikoku.  It has three easily defensible entrances, which made it a secure highway for coastal shipping until the American aerial mining offensive of 1945 blocked the entrances. These entraces were the Hiyo Strait, at the north end of the Bungo Channel, between Kyushu and Shikoku; the Kanmon or Shimonoseki Strait between Kyushu and Honshu; and the Naruto and Kitan Straits between Shikoku, Honshu, and the small island of Awaji, at the north end of the Kii Channel. Each was protected by a heavy artillery fortress regiment.

On 24 and 28 July 1945 the Inland Sea was hit by massive carrier strikes, with the strike on 24 July alone consisting of 1747 sorties. Carrier Amagi, three battleships, two heavy cruisers, and two old cruisers were sunk and many other warships badly damaged.

References

Madej (1981)

Morison (1959)



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