Japanese submarines in the Pacific War

A Japanese midget submarine grounded on Oahu Beach, Hawaii, 1941.

Japanese submarines in the Pacific War consisted of 169 boats of the Imperial Japanese Navy. During the war Japanese submarines sunk two US aircraft carriers, a cruiser and numerous other warships. Later they became used to resupply isolated island garrisons. The Japanese began the war with an advanced torpedo design, the Type 93 Long Lance.

Operations

Midget submarines

Japanese midget submarines were involved many actions during the Pacific war including the attacks on Pearl Harbor and Sydney Harbour.

Attacks on the American mainland

Japanese submarines shelled and carried out reconnaissance on the continental United States. There were plans for a three aircraft attack on the Panama Canal.^{[citation needed]}

USS Indianapolis

The I-58 sank the heavy cruiser USS Indianapolis shortly after it delivered the atomic bomb Little Boy at Tinian. The loss of the Indianapolis was not noticed for four days, which resulted in the deaths of hundreds of American sailors at sea, and constituted greatest loss of life in a single incident in the history of the United States Navy.

Yanagi Missions

The crew of I-29 with that of the German U-180 off the coast of Madagascar, 1943

After 1942, submarines become the only remaining supply link between Germany and Japan, and trade was focused on strategic materials, technical plans and blueprints. Only a small number of submarines managed to reach either destination and only four Japanese submarines succeeded in these Yanagi attempts: I-30 (April 1942), I-8 (June 1943), I-34 (October 1943) and I-29 (December 1943).^{[citation needed]}

Before I-29 embarked on her voyage to German-occupied France in December 1943, she had previously rendezvoused with the German U-180 during an earlier mission to the Indian Ocean. During this meeting on 28 April 1943, Indian nationalist Subhas Chandra Bose was transferred to I-29 to became the only civilian exchanged between two submarines of two different navies in World War II.

See also

• Allied submarines in the Pacific War
  

Imperial Japanese Navy submarines