The Japanese submarine "I-156" (originally "I-56") was a cruiser submarine of the KD3B sub-class built for the Imperial Japanese Navy (IJN) during the 1920s.
The Japanese submarine "I-156" ("I-56 ", until 20 May 1942) was a"Kaidai " type of cruiser submarine. A KD3B sub-class boat,"I-56" was built for the Imperial Japanese Navy (IJN) during the 1920s.