[4] Upon receiving the news that day, her crew destroyed her secret documents and distributed some of the food and fuel on board to local fishermen.

[4] In late August 1945, she proceeded from Saeki Bay to Kure, Japan, her crew throwing all of her ammunition and the torpedoes in her hold overboard during the voyage.

[4] Only a skeleton crew consisting of her commanding officer and seven crewmen remained aboard after her arrival at Kure on 24 August 1945.

[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-111.

[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-109).