The Ko-Hyoteki (Target A) Ko Gata (Type A ) class midget was equipped with an electric motor driven by 384 two-volt batteries. The Type A class could reach 19 knots submerged. They carried two bow 17.7-inch torpedoes. About 60 boats were completed before the end of the war and were used in attacks on Allied warships and shipping at Pearl Harbor, Sydney, Diego Suarez and Guadalcanal.
| Units | 60 |
|---|---|
| Years Completed | 1934-1942 |
| Displacement | 46 tons submerged |
| Dimensions | 78.5 ft x 10.2 ft x 6 ft (dia.) |
| Machinery | 1 electric motor: 600 hp; two counter-rotating screws on a single shaft, |
| Speed | 23 knots / 19 knots |
| Range | 80 nm @ 6 knots/100 nm @ 2 knots |
| Armament | 2x 17.7-inch (450mm) TT fwd + (2 torpedoes). |
| Max. Depth | 30 m (100 feet) |
| Crew | 2 |
