I-60 was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3B sub-class commissioned in 1928. In 1939, she was involved in a collision...

I-68, later renumbered I-168, was an Imperial Japanese Navy Kaidai–type cruiser submarine of the KD6 sub-class commissioned in 1934. She served in World...

I-201-class submarines (伊二百一型潜水艦, I-ni-hyaku-ichi-gata sensuikan) were submarines of the Imperial Japanese Navy during World War II. These submarines...

I-58 was a Japanese B3 type cruiser submarine that served in the final year of World War II. Her only significant wartime success came with a conventional...

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

I-8 was an Imperial Japanese Navy Junsen III (or J3)-type submarine commissioned in 1938 that served during World War II. Designed as submarine aircraft...

I-21 (伊号第二一潜水艦, I-gō Dai Nijū-ichi sensui-kan) was a Japanese Type B1 submarine which saw service during World War II in the Imperial Japanese Navy. She...

I-400 (伊号第四百潜水艦, I-gō-dai yon-hyaku-sensuikan) was an Imperial Japanese Navy Sentoku-type (or I-400-class) submarine commissioned in 1944 for service in...

I-70 was an Imperial Japanese Navy Kaidai-type cruiser submarine commissioned in 1935. While supporting the Japanese attack on Pearl Harbor at the beginning...

I-401 (伊号第四百一潜水艦, I-gō-dai yon-hyaku-ichi-sensuikan) was an Imperial Japanese Navy Sentoku-type (or I-400-class) submarine commissioned in 1945 for service...

The Japanese submarine I-176 (I-76, until 20 May 1942) was a "Kaidai" type of cruiser submarine active in World War II. A KD7 sub-class boat, I-176 was...

Ro-60, originally named Submarine No. 59, was an Imperial Japanese Navy Type L submarine of the L4 subclass. She was in commission from 1923 to 1934 and...

(later renumbered I-121), I-22 (later renumbered I-122) and I-23 (later renumbered I-123) — were the Imperial Japanese Navy's only submarine minelayers. They...

I-13 was an Imperial Japanese Navy Type AM submarine that served during World War II. Designed as a submarine aircraft carrier, she was commissioned in...

I-7 was an Imperial Japanese Navy J3 type submarine commissioned in 1937. She was a large cruiser submarine that served in World War II. She operated...

I-26 was an Imperial Japanese Navy B1 type submarine commissioned in 1941. She saw service in the Pacific War theatre of World War II, patrolling off the...

I-402 (伊号第四百二潜水艦, I-gō-dai yon-hyaku-ni-sensuikan) was an Imperial Japanese Navy Sentoku-type (or I-400-class) submarine commissioned in 1945 for service...

The I-400-class submarine (伊四百型潜水艦, I-yon-hyaku-gata sensuikan) Imperial Japanese Navy (IJN) submarines were the largest submarines of World War II and...

I-16 was one of five Type C cruiser submarines of the C1 sub-class built for the Imperial Japanese Navy, Commissioned in 1940, she deployed a midget submarine...

I-66, later I-166, was a Kaidai-class cruiser submarine of the KD5 sub-class completed for the Imperial Japanese Navy in 1932. She served during World...

I-75, later I-175, was an Imperial Japanese Navy Kaidai-type cruiser submarine of the KD6B sub-class commissioned in 1938. During World War II, she took...

I-69, later I-169, was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD6 sub-class commissioned in 1935. She served in World War II...

I-14 was an Imperial Japanese Navy Type AM submarine that served during World War II. Designed as a submarine aircraft carrier, she was commissioned in...

I-159, originally I-59, was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3B sub-class in commission from 1930 to 1945. During World...

The second I-56 was an Imperial Japanese Navy Type B3 submarine. Completed and commissioned in June 1944, she served in the late stages of World War II...

The Kaidai-type submarine (海大型潜水艦, Kaidai-gata sensuikan) was a type of first-class submarine operated by the Imperial Japanese Navy (IJN) before and...

I-177 was an Imperial Japanese Navy Kaidai-type cruiser submarine of the KD7 subclass commissioned in 1942. She served during World War II, patrolling...

I-58, later I-158, was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3A sub-class commissioned in 1928. During World War II, she supported...

I-6 was an Imperial Japanese Navy J2 type submarine commissioned in 1935. She was a large cruiser submarine that served in the Second Sino-Japanese War...

I-10 was an Imperial Japanese Navy Type A1 submarine that served during World War II. Designed as a submarine aircraft carrier, she was commissioned in...