Ro-65 was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1926, she served in the waters of Japan prior to World War...

Ro-61, originally named Submarine No. 72, was an Imperial Japanese Navy Type L submarine of the L4 subclass. She was in commission at various times from...

Ro-41 was an Imperial Japanese Navy Kaichū type submarine of the K6 sub-class. Completed and commissioned in November 1943, she served in World War II...

most varied and powerful submarine fleets. The Imperial Japanese Navy (IJN) acquired its first submarines during the Russo-Japanese War on 12 December 1904...

Ro-66 was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1927, she served in the waters of Japan prior to World War...

Ro-1, originally named Submarine No. 18, was an Imperial Japanese Navy Type F submarine of the F1 subclass. She and her sister ship Ro-2 were the first...

Ro-2, originally named Submarine No. 21, was an Imperial Japanese Navy Type F submarine of the F1 subclass. She and her sister ship Ro-1 were the first...

Ro-64, originally named Submarine No. 79, was an Imperial Japanese Navy Type L submarine of the L4 subclass. First commissioned in 1925, she served in...

Ro-5, originally named Submarine No. 33, was an Imperial Japanese Navy Type F submarine of the F2 subclass. The Type F submarines were the first truly...

Ro-4, originally named Submarine No. 32, was an Imperial Japanese Navy Type F submarine of the F2 subclass. The Type F submarines were the first truly...