I-56 | Trackpads Warship Archive

伊号第五十六潜水艦 (I-56 submarine), Japanese submarineThe Japanese book "軍艦写真帖" (pictures of warships) a revised edition · Public domainImage source

ClassOtsu-Gata B3 class

NavyImperial Japanese Navy

CountryJapan

Recorded statusSunk

What is known about this ship

I-56 is documented as an ships within the WAR-CL-000211 roster.

Service history

Source-recorded disposition: sunk 18.4.1945.

Class context: Otsu-Gata B3 class

The B3 boats were long-range Japanese cruiser submarines with reduced machinery power and increased endurance.

Later service and disposition

sunk 18.4.1945.

Class relationship

This ship is recorded as a member of Otsu-Gata B3 class. Shared design history belongs on the class page; this page concentrates on the individual hull where evidence is available.

Sources and further reading

OTSU-GATA B3 cruiser submarines (1944) ↗Navypedia · accessed 2026-09-18
Conway's All the World's Fighting Ships, 1922–1946Conway Maritime Press

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