Ro-67 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 II. During World War II, she operated in the Central Pacific, supported Japanese forces in the Battle of Wake Island and invasion of Rabaul, and took part in the Aleutian Islands campaign. She was decommissioned in 1945 and scrapped in 1946.