| Year | 1915 |
| Weapon Type | Heavy Howitzer |
| Origin & Designer | Japan/Osaka Arsenal |
| Numbers Produced | 280 |
| Crew | 10 |
| Calibre | 149.1mm |
| Elevation | -5° to +65° |
| Traverse | 60° |
| Breech | Vertical Sliding Wedge |
| Recoil | Hydropneumatic |
| Gun Sight | Panoramic |
| Gun Mount | [@gun_mounts] |
| Carriage | Box Trail |
| Trailers | [@trailers] |
| Gun Shield | 4mm |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 2.190mm (L/14.7) |
| Overall Length | 6.40m |
| Width | 1.88m |
| Height | 2.11m |
| Weight | Weight in Traction: 2.837 kg Weight in Action: 2.797 kg |
| Round Weight | 36.9 kg (HE) |
| Muzzle Velocity | 398 m/s |
| Feed | [@feed] |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | [@practical_rate_of_fire] |
| Rate of Fire | 4 r.p.m. |
| Maximum Rate of Fire | [@maximum_rate_of_fire] |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 8.800m |
| Armour Penetration | [@armour_penetration] |
| Traction | Horse Drawn (Two Loads) or Motorised (5-Ton Truck) |
| Variants | [@variants] |
| Notes | The type 4 was designed to replace the obsolete type 38 and went on to become the standard heavy howitzer used by the IJA. It shared the same round as the type 38 but because of the use of bagged charges, it could fire at double the range. It was widely used and stayed in service until the Second World War. |