C2 Class, Japanese Submarines

Photograph of C2-class submarine

U.S. Navy. Via Wikimedia Commons



2184 tons standard displacement
2557 tons surfaced
3564 tons submerged


350'10" by 29'10" by 17'6"
106.93m by 9.09m by 5.33m

Maximum speed      

23.5 knots (surfaced)
8 knots (submerged)
Dive to 330 feet (100 meters)


1 5.5"/50 gun
2 25mm/60 machine guns
8 21" torpedo tubes (20 torpedoes)
2-shaft diesel (12,400 hp) or electric (2000 hp)
Range 14,000 nautical miles (26,000 km) at 16 knots surfaced
60 nautical miles (110 km) at 3 knots submerged
Late 1944: I-47 and I-48 modified to carry four Kaiten by removing their deck guns. Surviving units likely received Type 13 air search radar and Type 22 surface search radar.
1945: I-47 further modified to carry an additional two Kaiten.

The C2s were virtually identical to the C1s. However, they were not equipped to carry a midget submarine. Another seven units were planned but not laid down.

Some authors list the C1s as the Cs and the C2s as the C1s.

Units in the Pacific:


Completed 1944-2-29 (Sasebo)      

Missing from 1944-10-27 off Leyte
I-47 Completed 1944-7-10 (Sasebo)      
I-48 Completed 1944-9-5 (Sasebo)       Sunk 1945-1-23 off Yap by Conklin, Corbesier and Raby


Boyd and Yoshida (1995)

Carpenter and Polmar (1986)

Jentschura, Jung, and Mickel (1977)

Worth (2001)

Yutaka (1962)