Sen Yu Sho

Ha 101-200   (scanned from A.J. Watts' "Japanese Warships of World War II")

The Sen Yu Sho (small supply submarine) were also referred to as the SS Type. These submarines were intended to be mass produced and replace losses of the larger D1/D2 submarines. They featured all welded, modular hulls that allowed for a short five-month construction time. They carried no torpedo tubes, but some could carry ten 18-inch torpedoes as cargo for resupply of midget submarines. They carried a 25-mm AA gun. Twelve boats were laid down of which 10 were completed before the end of the war. Another planned 88 were cancelled.

Units 10
Ships HA-101-109 and HA-111
Year Completed 1944-1945
Displacement 429 tons / 493 tons
Dimensions 146 ft x 20 ft x 13.3 ft
Machinery 2 diesels: 400 hp

1 electric motor: 150 hp

Speed 10 knots / 5 knots
Range 4,000 nm @ 8 knots
Armament No TT , 1x25-mm AA mg .
Max. Depth 100 m (330 feet)
Crew 21 officers and men