| 28 cm howitzer L/10 | |
|---|---|
.jpg) A 28 cm howitzer during the siege of Port Arthur. | |
| Type | Coastal artillery, Heavy siege howitzer |
| Place of origin |  Empire of Japan |
| Service history | |
| In service | 1892-1945 |
| Used by | Imperial Japanese Army |
| Wars | Russo-Japanese War, Second Sino-Japanese War |
| Production history | |
| Designer | Armstrong |
| Designed | 1884 |
| Manufacturer | Osaka Artillery Arsenal |
| No. built | 327 total (220 for coastal defense) |
| Specifications | |
| Mass | 10.758 tonnes (10.588 long tons; 11.859 short tons) |
| Barrel length | 2.863 m (9.39 ft) (L10.2) |
| Shell | Separate loading bagged charge and projectile |
| Shell weight | 217 kg (478 lb) |
| Caliber | 280 mm (11 in) |
| Breech | Interrupted Screw |
| Carriage | Box trail |
| Elevation | -10° to +68° (firing) |
| Traverse | 360° |
| Muzzle velocity | 314 m/s (1,030 ft/s) |
| Maximum firing range | 7,800 m (8,500 yd) |
The 28 cm howitzer L/10 (二十八糎榴弾砲, nijūhachi-senchi ryūdanhō) was a Japanese coastal and siege howitzer. It was developed by Armstrong before 1892 and saw service in the Russo-Japanese War during the siege of Port Arthur and the Second Sino-Japanese War.