Fukuichi Maru No. 5 was an auxiliary patrol boat of the Imperial Japanese Navy during World War II.
Fukuichi Maru No. 5 was ordered by Japanese shipping company Tokai Yenyo Gyogyo K.K. and laid down on 1 March 1933 at the shipyard of Goshi Kaisha Kanasashi Zosensho. She was launched and completed on 1 June 1933. On 5 September 1941, she was requisitioned by the Imperial Japanese Navy and converted to an auxiliary patrol boat. She was assigned to 1st platoon, Patrol division 7, 5th Fleet along with , , and . On 18 February 1945, she was attacked and sunk northwest of Chichi Jima by the US destroyers , , and . She was struck from the Navy list on 10 April 1945.