I-201 class submarine
1,291 tons (surfaced)
1,451 tons (submerged)
79m x 9.2m x 7m
4 x torpedo tubes
(10 Type 95 torpedoes)
2 x 25mm AA guns
Designed for mass production, with large sections prefabricated in factories and transported to the slip for final assembly. The irst submarine in the I-201 class sen-taka high speed submarine. Capable of bursts of underwater speeds up to 19 knots for almost an hour with a streamlined body, conning tower and retractable anti-aircraft guns.
Construction began on August 1, 1944 at Kure. Completed and commissioned on February 2, 1945. Assigned to Captain Sakamoto and assigned to SubDiv 33, Kure SubRon for performance tests.
This sub saw no wartime service before the war ended. On August 15, 1945 the submarine was at Maizuru with the I-121.
During November 1945, proceeded to Sasebo, where LtCdr John P. Currie, USN, is posted as captain and he is ordered to test the sub and sail Pearl Harbor. On December 11, 1945 a fire breaks aboard and destroys 14 cells in her forward battery compartment.
Tested off Sasebo during December 28, 1945 to January 8, 1946 with an American crew. Afterwards, departs Japan for Pearl Harbor via Apra Harbor on Guam. On January 25, departs for Eniwetok, suffers engine failure on January 26 and is taken in tow by USS Curret (ARS-22) and arrives at Eniwetok on January 31, then departs on February 2 and arrives at Pearl Harbor on February 13.
Studied until at Pearl Harbor, until a Submarine Officer's Conference on March 26, 1946 decided I-201 and other captured subs would be sunk.
On May 23, 1946 at 10:58am sunk off Barber's Point off Oahu by a torpedo fired from USS Queenfish SS-393, to test the Mark 9 exploder. Over the course of several days, the other three captured Japanese submarines were sunk including I-400, I-14, and I-401.
The Hawaii Undersea Research Laboratory found the wreck of the I-201 near Hawaii using an ROV during 2009.
I-400: Japan's Secret Aircraft-Carrying Strike Submarine: Objective Panama Canal
The definitive account of the I-400's history, crew, mission, capture, evaluation and sinking
National Geographic "Hunt for Samurai Subs" November 17, 2009
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May 22, 2017
21 13 N
158 08 W