Type 4 Amphibious Vehicle "Ka-Tsu"
- Introduced Year : 1944
- Weight : 16 ton
- Dimensions: 11 x 3.3 x 2.8(h) m
- Armor (max) : 10 mm
- Speed (max) : 20 km/hr (ground), 8 km/hr (water)
- Engine : Diesel Engine 120 HP
- Armaments : 13 mm x 2
- Crew : 5
- Capacity : 4 ton cargo or 40 men
- Production Qty : 49
Ka-Tsu was the amphibious carrier of cargo or troops developed by IJN. The engine component and electric devices are watertight and it can be carried underwater by submarine.
Some Ka-Tsu's were equipped with two torpadoes on the deck. They were the special model to attack the Allied vessels at anchor in the Pacific atolls. However, the attack by Ka-Tsu was not carried out.