I-54 , later I-154 , was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3A sub-class commissioned in 1927. During World War II, she conducted three war patrols, supporting Japanese forces during the invasion of Malaya in December 1941 and the Dutch East Indies campaign in early 1942, then was assigned to training duties until she was decommissioned in 1944. She was scuttled in 1946.

The Kaidai-type submarine was a type of first-class submarine operated by the Imperial Japanese Navy (IJN) before and during World War II. The type name was shortened to Kaigun-shiki Ōgata Sensuikan (海軍式大型潜水艦) Navy Large Type Submarine.