Type 4 40cm Rocket Launcher
- Introduced Year : 1943
- Caliber : 400 mm
- Barrel Length : 3.22 m
- EL Angle of Fire :
- AZ Angle of Fire :
- Shell Weight : 508 Kg
- Shell Speed : 220 m/sec
- Weight : 0.22 ton
- Range : 3,700 m
- Production Qty :
Differing from 20cm Rocket, heavy 40cm Rocket needed the special launcher for its projection. 40cm Rocket was used in Okinawa and Iwo Jima as well as 20cm Rocket.