This was the standard Japanese heavy AA weapon of the war, being carried aboard a wide variety of vessels, and also used as a coast defence mount. It was a fairly good weapon, although its muzzle velocity was fairly unimpressive.
| Bore | 5.0 inches |
| Weight | 3.0 tons |
| Length OA | 208.0 inches |
| Weight Projectile | 50.7 lbs. |
| Muzzle Velocity | 2379 ft/s |
| Max. Elevation | +90/-8 degrees |
| Max. Range | 16,075 yards 30,970 ft. max. ceiling. |
| Rate of Fire | 8/min |
