Japanese submarine ''I-56'' may refer to one of the following
submarine
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
s of the
Imperial Japanese Navy:
*
Japanese submarine ''I-56'' (1928), a
''Kaidai''-class cruiser submarine; renamed ''I-156'' in 1942; scuttled in 1946
*
Japanese submarine ''I-56'' (1943), a
B3-class cruiser submarine; sunk in 1945
{{DEFAULTSORT:I-56, Japanese submarine
Japanese Navy ship names
Imperial Japanese Navy ship names