Completed and commissioned in December 1944, she served during the final months of World War II, participating in training activities and performing rescue duty off Japan for Japanese aircrews who came down at sea.

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

[3] Ha-106 was laid down on 1 July 1944 by Kawasaki at Senshu, Japan, as Small Supply Submarine No.

[4] Reassigned to Submarine Division 33 for training purposes on 10 March 1945, she took part in Operation Tan No.

[4] On 2 November 1945, she was reassigned to Japanese Submarine Division Two under United States Navy command along with her sister ships Ha-103, Ha-105, Ha-107, Ha-108, Ha-109, and Ha-111.

[4] In November 1945, the U.S. Navy ordered all Japanese submarines at Kure, including Ha-106, to move to Sasebo, Japan.

[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.