Submarines of the Imperial Japanese Navy
The ("I-15"-class) submarines (, , , , , , , , , , , , , , , , , , , ) were the most numerous type of submarines of the Imperial Japanese Navy during World War II. In total 20 were made, starting with "I-15", the class ship. These were fast, very long ranged, and carried a single Yokosuka E14Y seaplane, located in a hangar in front of the conning tower, launched by a catapult.
Submarines of the Imperial Japanese Navy
Only six submarines attempted this trans-oceanic voyage during World War II: (mid-June to August 1942), (June 1943), (October 1943), (November 1943), and German submarines (August 1943) and (December 1944). Of these, "I-30" was partially successful but was later sunk by a mine, "I-8" completed her mission, "I-34" was sunk by British submarine , and "I-29" by the United States submarine, (assisted by Ultra intelligence). made the final attempt.