Japanese submarine I-4
Type J1 submarine
I-4 was an Imperial Japanese Navy J1 type submarine commissioned in 1929. She was a large cruiser submarine that served in the Second Sino-Japanese War and World War II. Wikipedia
Launched: May 22, 1928
Builder: Kawasaki Shipbuilding Corporation
Place built: Kobe, Hyogo, Japan
Ship Class: Type J1 submarine