| Vickers 10 inch /45 naval gun Type 41 10-inch (254 mm) /45-caliber naval gun BL 10 inch Mk VII | |
|---|---|
 Forward port gun turret on Japanese battleship Aki | |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1904–37 |
| Used by | Imperial Japanese Navy Royal Navy Italian Navy |
| Wars | World War I |
| Production history | |
| Designer | Vickers |
| Manufacturer | Vickers |
| Specifications | |
| Mass | 22 tons |
| Barrel length | 450-inch (11.430 m) bore (45 calibres) |
| Shell | IJN service : 518 pounds (235 kg) RN service : 500 pounds (227 kg) |
| Calibre | 10-inch (254 mm) |
| Elevation | -5 / +30 degrees |
| Traverse | +80 / -80 degrees |
| Rate of fire | 1.5 rounds per minute |
| Muzzle velocity | 2,657 ft/s (810 m/s) |
| Effective firing range | 26,900-yard (24,597 m) at 30° elevation |
The Vickers 10 inch naval gun was used on battleships and armoured cruisers built during the first decade of the 20th century. They were used as the Type 41 10-inch /45-caliber aboard the British-built semi-dreadnought Katori-class battleships and the natively-built Satsuma-class battleships of the Imperial Japanese Navy.