Background Information

Japanese Ammunition, Guns and Mountings Definitions
Japanese Type 91 Projectile Dimensions

Modern Weapons

1980 to Present
5"/62 Mark 45 Mod 4 (USA)
Atago (2003) class
 127 mm/54 Compact (Italian)
Kongô (1990) and Takanami classes
 5"/54 Mark 42 (USA)
Haruna, Shirane, Takatsuki, Tachikaze and Hatakaze classes
 76 mm/62 Compact
Murasame, Hatsuyuki, Asagiri, Ishikari, Yûbari and Abukuma classes
 20 mm Phalanx (USA)
Japanese ships after 1980
 20 mm/76 Gatling
Japanese Patrol Boats after 1980

Historical Weapons

Battleship Main Guns

51 cm/45 Type 98
"Super Yamato" (Design A-150)
 36 cm/45 5th Year Type,
(Actual size 48 cm)
Experimental
 46 cm/50 5th Year Type
13 Class
 40 cm/45 Type 94,
(Actual size 46 cm)
Yamato Class
 41 cm/45 3rd Year Type,
40 cm/45 3rd Year Type
Nagato, Kaga, Amagi and Kii Classes
 14"/45 Vickers Mark "A",
14"/45 43rd Year Type,
14"/45 41st Year Type,
36 cm/45 41st Year Type
Kongô (1912), Ise and Fusô Classes
 12.6"/38 KA Gun,
12.6"/38 41st Year Type,
32 cm/38 41st Year Type
Itsukushima Class
 31 cm/50 Type 0
B-65 Class
 12"/50 Armstrong/Vickers,
12"/50 41st Year Type,
30 cm/50 41st Year Type
Kawachi Class
 12"/45 Armstrong,
12"/45 41st Year Type,
30 cm/45 41st Year Type
Katori, Tsukuba, Kurama, Satsuma and Kawachi Classes
 12"/40 EOC Patterns,
12"/40 41st Year Type,
30 cm/40 41st Year Type
Fuji, Shikishima and Mikasa Classes
 12"/40 Pattern 1895 (Russia)
Iwami (ex-Russian Orel)
 12"/30 Pattern 1877 (Russia)
Iki (ex-Russian Imperator Nikolai I)
 10"/45 Vickers,
10"/45 41st Year Type,
25 cm/45 41st Year Type
Satsuma and Katori Classes
 10"/40 EOC Pattern R,
10"/40 41st Year Type,
25 cm/40 41st Year Type
Kasuga Class
 10"/45 Pattern 1891 (Russia)
Mishima and Okinoshima (1905) (ex-Admiral Senyavin and General-Admiral Apraksin)

Cruiser / Destroyer Main Guns and Battleship / Cruiser Secondary Guns

9"/35 Pattern 1877 (Russia)
Iki (ex-Russian Imperator Nikolai I)
 20 cm/50 3rd Year Type No. 2
All Japanese Heavy Cruisers after 1940
 20 cm/50 3rd Year Type No. 1
Akagi, Kaga, Furutaka, Aoba and Myôkô Classes
 8"/45 Pattern 1892 (Russia)
Aso (ex-Russian Bayan)
 8"/45 EOC Patterns,
8"/45 41st Year Type,
20 cm/45 41st Year Type
Armored Cruisers of the early 1900s
 20 cm/12 Short Gun
Merchant Ships of World War II
 15.5 cm/60 3rd Year Type
Yamato, Ôyodo, Mogami and Tone (1938) Classes
 6"/50 Vickers Mark M,
6"/50 Mark II and Mark III,
15 cm/50 41st Year Type
Kongô (1912), Fusô and Agano Classes
 6"/45 Elswick,
6"/45 41st Year Type,
15 cm/45 41st Year Type
Tone (1910) and Chikuma (1910) Classes
 6"/45 Pattern 1892 (Russia)
Iwami (ex-Russian Oryol)
 6"/40 QF EOC Patterns,
6"/40 41st Year Type,
15 cm/40 41st Year Type
Pre-dreadnoughts and Armored Cruisers
 14 cm/40 11th Year Type
Submarines of the 1930s
 5.5"/50 3rd Year Type,
14 cm/50 3rd Year Type
Battleships and Cruisers 1915 - 1925
 5"/54 Mark 16 (USA)
Akizuki (1959) and Murasame Classes
 5"/38 Mark 12 (USA)
Yugure Class (ex-USN Fletcher type)
 12.7 cm Type 1 or Type 5
Land Mountings
 12.7 cm/50 3rd Year Type
Fubuki, Ayanami, Akatsuki, Chidori, Hatsuharu, Shiratsuyu, Asashio, Kagerô, Yûgumo and Shimakaze Classes
 12.7 cm/40 Type 88,
12.7 cm/40 Type 89
Type 88: I.5 and I.6
Type 89: Battleships, heavy cruisers, aircraft carriers, numerous minor warships and auxiliaries 1932 - 1945
 12 cm/45 10th Year Type
Akaki, Kaga, Furutaka, Aoba, Myôkô and Takao Classes, small carriers, minor warships and auxiliaries 1932 - 1945
 4.7"/45 3rd Year Type,
12 cm/45 3rd Year Type,
12 cm/45 11th Year Type
Momi, Minekaze, Wakatake, Kamikaze, Mutsuki, Ootori, I153 and I171 Classes
 4.7"/40 Elswick,
4.7"/40 41st Year Type,
12 cm/40 41st Year Type
Tone (1910), Umikaze, Sakura, Urakaze, Kaba, Isokaze, Momo and Enoki Classes
 120 mm/45 Pattern 1892 (Russia)
Mishima and Okinoshima (1905) (ex-Admiral Senyavin and General-Admiral Apraksin)
 12 cm/12 Short Gun
Merchant Ships of World War II
 4"/40 BL Mark VIII
Sakaki
 10 cm/65 Type 98
Akitzuki (1942), Oyodo, Taiho and B-65 Classes
 10 cm/50 Type 88
I 165 (Type KD 5) and I 168 (Type KD 6A) Classes

Smaller Caliber and Anti-Aircraft Guns

8 cm/60 Type 98
Agano and Ibuki Classes
 3"/40 3rd Year Type,
8 cm/40 3rd Year Type,
8 cm/40 11th Year Type,
8 cm/40 Type 88
Furutaka and Aoba Classes
Small ships and submarines 1930 to 1945
 3"/40 Elswick Pattern N and Vickers Mark Z,
3"/40 41st Year Type,
8 cm/40 41st Year Type
Most warships built around 1900
 3"/25 Short Guns,
8 cm/25 Short Guns
Small ships and submarines
 3"/50RF
Yugure Class (ex-USN Fletcher type)
 47 mm (3-pdr.) (Russia)
Captured ships from Russo-Japanese War
 4 cm/60 Type 5
Prototypes
 40 mm/62 "BI" Type (Britain)
Many ships 1925 to 1935
 25 mm/60 AA MG Type 96
Almost all warships of World War II
 13 mm/76 AA MG Type 93
Almost all warships of World War II
 12 mm/62 "BI" Type
A few ships 1925 to 1935
 7.7 mm/94 "BI" Type
Many ships 1925 to 1935
 7.7 mm "RU" Type and Type 92
A few ships 1921 to 1935
 6.5 mm 3rd Year Type
A few ships 1915 to 1925
 12 cm AA Rocket
Carriers after 1944