Type A submarine

Class overview
Name	Type-A submarines
Builders	Kure Naval Arsenal Kawasaki Shipbuilding
Operators	Imperial Japanese Navy
Preceded by	Junsen type submarine
Subclasses	Type-A (I-9-class) Type-A Modified 1 (I-12-class) Type-A Modified 2 (I-13-class)
Built	1938–1945
In commission	1941–1945

The Cruiser submarine Type-A (巡潜甲型潜水艦, Junsen Kō-gata sensuikan) was a class of submarine in the Imperial Japanese Navy (IJN), which served during the Second World War. The Type-A submarines were built to take a role of the command ships for submarine squadrons. For this reason they had equipment for a headquarters, better radio facilities and a floatplane.