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.
Japanese submarine I-70
The Japanese submarine "I-70" was a "Kaidai" type of cruiser submarine active in World War II. A KD6 boat, "I-70" was built for the Imperial Japanese Navy (IJN) in the early 1930s. At that time it was commanded by Commander Sano Takao.