[1] For surface running, the boats were powered by a single 400-brake-horsepower (298 kW) diesel engine that drove one propeller shaft.

The boats were armed a single mount for a 25 mm (1 in) Type 96 anti-aircraft gun.

[3] Ha-111 was laid down on 6 November 1944 by Mitsubishi at Kobe, Japan, as Small Supply Submarine No.

[4] On 2 November 1945, Ha-109 was reassigned to Japanese Submarine Division Two under United States Navy command along with her sister ships Ha-103, Ha-105, Ha-106, Ha-107, Ha-108, and Ha-109.

[4] She was among a number of Japanese submarines the U.S. Navy scuttled off the Goto Islands near Sasebo in Operation Road's End on 1 April 1946, sinking just beyond the 100-fathom (600 ft; 183 m) line at 32°37′N 129°17′E / 32.617°N 129.283°E / 32.617; 129.283 (Ha-111).