KD4 Class, Japanese Submarines

Photograph of KD4-class submarine

Wikipedia Commons


Tonnage 1635 tons standard
1720 tons surfaced
2300 tons submerged
Dimensions 320'6" by 25'7" by 15'10"
97.69m by 7.80m by 4.83m
Maximum speed 20 knots surfaced
8.5 knots submerged
Dive to 200 feet (61 meters) (Type 4)
to 230 feet (70 meters) (Type 5)
Complement 58
62-88 (Type 5)
Armament 1 4.7"/45 dual-purpose gun
1 25mm/76 AA gun (Type 5)
1 light machine gun
6 21" torpedo tubes (14 torpedoes)
2-shaft diesel (6000 bhp) or electric (1800 shp)
Bunkerage 230 tons diesel oil
Range 10,800 nautical miles (20,000 km) at 10 knots surfaced
6130 nautical miles (11,400 km) at 16 knots surfaced
60 nautical miles (110 km) at 3 knots submerged

The KD4s were completed between 1925 and 1930 at the Mitsubishi shipyard in Kobe and were a slightly smaller version of the KD3s, with two fewer torpedo tubes. We include here also the very similar KD5 class (I-65, I-66).

Units in the Pacific:


off Malaya north of Singapore

Renumbered I-162 on 1942-5-20 and relegated to training duty on 1944-7-1. Converted to a Kaiten carrier on 1945-4-1.


off Malaya north of Singapore     

Torpedoed by Triton 1942-5-17 off Midway


off Malaya north of Singapore

Sunk by aircraft 1945-6-27 512 miles east of Saipan


off Malaya north of Singapore

Torpedoed by Telemachus 1944-7-17 in Straits of Malacca


Jentschura, Jung, and Mickel (1977)

Carpenter and Polmar (1986) (accessed 2009-12-24)

Worth (2001)

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